View Full Version : Building me an MB, Jerp that is.

09-24-2017, 02:03 PM
Whilst doing research for the still to be started half track build I kept coming across pictures of Willys MB jeeps, a vehicle I have always had a soft spot for. This resulted in research into Willys jeeps ::doh:: which resulted in me finding on Thingiverse the files for a 1/10 scale 3d printable model designed to be RC it was originally produced by Ossum but has been remixed a few times now, the orginal files can be found here (https://www.thingiverse.com/thing:2056923).

So far around several 3d printer issues (the heated bed stopped working making printing ABS impossible) I have managed to print the entire body and glued it together. The body has been nicely designed, the main tub being in two parts and then the front and rear fenders, grill, bonnet, scuttle panel and windscreen all being seperate items.

I won't be printing the chassis or axles, although I may print some parts for the axles, but am printing a set of 1.55 wheels I again found on Thinigverse.

The axles are going to be modified metal SCX-10 II narrowed to 120mm with leaf spring mounts. Drive train and electrics to be decided, as usual I will be making a steel c section chassis replicating the 1:1.

Ok enough words :pics:




Having put it all together, I then started cutting the windscreen up as I didn't like it. On a 1:1 jeep the screen appears to have a tubular frame. So today was spent cutting and bending some small stainless tube I have to make the new screen. I have kept the lower part of the printed screen as it matches the scuttle panel very closely and I will be using the inner part of the original too.




More as it happens,

09-24-2017, 05:17 PM
I love a Willys build. Will be watching!

09-24-2017, 07:06 PM
I love a Willys build. Will be watching!

This coming from a guy that hates Jeeps! I'll also be following. ;)

09-25-2017, 06:57 PM
definitely following this looks about same size as my willys (the jeep ) not the ..never mind;)

09-26-2017, 03:07 PM
This coming from a guy that hates Jeeps! I'll also be following. ;)

I'm a total Jeep guy

09-27-2017, 01:34 PM
I love a Willys build. Will be watching!

This coming from a guy that hates Jeeps! I'll also be following. ;)

Thanks guys, I'm not really a jeep fan either, just have a soft spot for these little MB's/GPW's.

definitely following this looks about same size as my willys (the jeep ) not the ..never mind;)

This is 140mm (5 1/2") wide at it's widest and 280mm (11") long with a stock wheelbase of around 205mm (8") :laughing:

I am going to be making custom axles using som SCX II parts I was hoping to get them down to 120mm pin to pin but i think I may have to go for 130mm to give clearance on the leafsprings.

09-28-2017, 01:11 PM
Looks great! and so tiny!

10-21-2017, 07:20 AM
Looks great! and so tiny!

Thanks Chris, however I decided 1:10 was just a little too tiny for the level of detail I am aiming for, plus I had to redesign a few bits as I found a 1:1 build that I want to replicate that has some subtle mods to the body that I wanted to incorporate.

Here's a pic of the inspiration


It's a 1942 Willys MB on 35" tires with at essentially stock (1" lift) ride hieght. It's known as Rango and has done the Ultimate adventure twice. Build thread can be found here :- Rango on Pirate 4x4 (http://www.pirate4x4.com/forum/jeep-willys/1000503-rango-1942-willys-mb.html) , it's a long read ;)

So a number of hours in front of the PC all parts are now rescaled and I have also created the tweeked bits and begun printing. Today I glued the main bits together of this and started on a second for a Scalefabshop customer (this one is going to be stock)




Drive train is going to be essentially the same just the axles will be wider and the tires will be 100mm not 80mm.

more soon.

10-22-2017, 01:24 PM
Just show how small the Willys is here's a couple of pictures of the body next to the Blue JK




The wheel base is around 8.86" (225mm)

10-29-2017, 10:01 AM
Had a chance to sneak off to the shed today :wow:

So started work on the chassis for the little Jeep.

Now the 1:1 chassis (for Rango) was built by the owner from some 4"x 2" steel box section and he very kindly provided a PDF in his build thread with the dimensions. I couldn't find any box section, steel or brass that was of the correct scaled down size, actually that's not quite true as I did find some brass but enough sections came to about 80 ::doh::. So I have gone for 10mm x 4mm steel bar as it was as close to the correct size as I could get and cost a grand total of 8 for 2 lengths.

The design is really simple as can be seen in the PDF, the worst part was drilling all the holes in the side plates.


I got both main rails cut and brazed and also managed to cut and drill all 4 side and started attaching them to the main rail.


Here are a couple of the body sitting on the rails.



I have also made a start on figuring out the transmission and transfer case, I should have some progress shots later in the week..

11-02-2017, 05:27 PM
A nice looking metalwork!

11-05-2017, 10:47 AM
A nice looking metalwork!

Thanks, I need to get back to doing the chassis but got side tracked :laughing:

Today was mostly spent modifying an SCX-10 II gear/transfer case to fit the body. The gear-reduction unit has a 5:1 ratio and is fitted to a 380 motor. I had to make an adapter plate to be able to bolt the gear reduction unit to the gearbox and made a new top shaft for the transmission to allow the drive to be connected.


Had to cut the floor slightly to allow the transmission to sit as high in the chassis as possible, but I think I got it fairly well tucked in ;)


This shot shows how much the transfer case will hang down below the chassis rail.


The clown shoes also arrived this week, thanks to Martin @RCbitz.


This is the kind of stance I am aiming for,


I am currently waiting for some new leaf springs to arrive and then I can continue with the axles.

More as it happens, thanks as usual for looking.

11-12-2017, 12:27 PM
Tiny bit more done today,

main chassis rails are finished and joined with front and rear cross members




Also started making the leaf springs as all the commercially available ones are too long or too short and too wide :rolleyes: .



These have been cold formed, using a round nose set of pliers, from a recoil starter spring. I will be adding helpers as I think they are going to be a bit too soft.

Next task will be making gearbox and motor mounts, but that won't be till next weekend I suspect.

12-14-2017, 03:44 AM
Great stuff Pete, I love seeing where people are taking my original design.

That chassis looks spot-on. Should give it a bit more heft too. You are right how tiny the original is, I don't think I ever realized just how small it was until I started measuring things, it also shows up just how wide the range of so-called 1:10 models really is.

12-18-2017, 06:53 AM
wow. your inspiration jeep is my friends Brennan, his actual build is incredible, your scale build is just as good!
nice work.

02-17-2018, 09:17 AM
wow. your inspiration jeep is my friends Brennan, his actual build is incredible, your scale build is just as good!
nice work.

Sorry for the slow response. That's awesome having read through his build on pirate an number of times I really like how he has solved the issues he had dduring the build by making and modifying parts rather than buying something that was almost right and calling it done.

I have not made a huge amount of progress on this recently as work/illness/other projects have gotten in the way, however today I got the majority of the front axle sorted, (needs one spring perch). I opted to modify a cheap set of alloy SCX-10 II casings that I found on ebay. I have removed the original axle tubes and made new steel ones, I then modified the c-hubs to fit, using the splined end of the original axle tube and some work in the lathe. I am using cheap alloy knuckles which I may attack with the dremel to make them look less bulky. The rea axle will be easier as I just need to make new steel tubes and some steel bearing retainers for the outer ends. The pin to pin measurement is around 170mm with the pumpkin offset to the correct side.





I hope tomorrow to get the axle completely mounted up and be able to move on to the rear.

More as it happens, and thanks as always for your interest.

02-23-2018, 12:41 PM
Ok so I didn't quite make as much progress as I hoped, however the front end will now support it's own weight, although I do still need to make up some U-bolts to replace the copper wire holding the axle to the springs.

I also narrowed the axle by 10mm (5mm off each side) as I wasn't happy with the stance when looking at it from straight ahead, fortunately this hasn't to badly impacted on the steering angle.






This will be full lock as the tire is almost touching the frame rail



Unladen it currently sits at about 60mm to the underside of the frame rails which isn't to bad, I expect to loose about 5mm once all the weight is in.


Had a go at removing the fins from one of the diff covers, needs a coat of paint but I think I shall be doing the other one too.


Thanks as usual for looking, more as it happens.

02-23-2018, 03:33 PM
Love this wyllis, my first 1/1 jeep...

02-24-2018, 10:07 AM
Love this wyllis, my first 1/1 jeep...

Thanks Eric glad you like the build.

Managed a bit more today, didn't do the U-bolts, but did do the rear axle.

I started off with one of these,


applied a hacksaw,a file and an 8mm drill bit and ended up with this


then made a few bit's out of steel (which I forgot to photograph) and joined them all together and ended up with this


also made and mounted the lower shock mounts on the fron axle.

The last piece of fab work today was to shorten one shaft I did this by cutting the shaft at the inner end of the bearing spacer and then (in the lathe)faced the cut and drilled a 4mm diameter 15mm deep hole. The inner section of shaft was then shortened by 5mm and fitted into the outer section and soldered. The picture shows the change in length against an unmodified shaft ( I hadn't soldered it at this point.)


The casings are now hanging in the shed with the first coat of primer drying on them.

02-25-2018, 09:52 AM
A little more progress today.

Started off by working out how to make the U-bolts.

I am using a piece of 2mm diameter stainless steel rod to make the final parts, firstly I made a trial U-bolt using some soft 2mm wire to judge the length of material I need for each U-bolt. 45mm seems to be the magic number as this should make the threaded portion to long so I can trim it back later.

Next was to find a way to make 8 as close to identicle bends in the stainless rod, so I made my self a little jig


Intially I cut a piece of stainless to length and then cut an m2 thread in either end and then tried to put the bend in un-fortunately this didn't work out to well as the rod kept snapping at the threaded section (I suspect the cutting process was hardening the material as well as making it a bit thinner)

The second method involves making the bends in the rod first and then cutting the thread afterwards, this throws up a slight issue as a normal die holder can't be used as the handles get in the way. So I made the second new tool of the day.


It's a piece of 20mm diameter aluminium bar with a 12mm pocket machined in one end on the lathe and a 6mm hole all the way through, the die is secured by an m3 grub screw.

I quickly tested the new holder on a scrap bit of stainless rod and am happy with the result, so I now need to bend 7 more U-bolts and cut the threads, but that is going to wait for another day.

As I was in the correct frame of mind to do some turning I modifed the shocks for this. I had mananged to aquire a set of 55mm long, thin bodied shocks (I think they are 3racing ones for the losi slider) but they were designed for an external coil spring and the top is a fairly large hexagon.

One down, 3 to go


Slightly annoyingly the plastic rod end on these shocks is yellow, they are m2 thread and have a 2mm hole through the ball so I suspect finding a replacement black or white set will prove tricky, I opted for painting the shock bodies yellow too.


Once the paint has fully hardend I will rebuild them with some 25 to 30wt oil.

While on the subject of paint I purchased a large tub of Vallejo olive green acrylic to use on this (I am going to be brush painting the body) however I wasn't totally happy with the shade (too light) so I added some black until I had a shade I was happy with,

Original on the left, new on the right.


I need to get some tamiya X-21 flat base to mix in as the current finish is too shiney.

With colour sorted I painted the axle casings (this is where I discovered the slightly shiney finish) and then fully assembled them.




Assembly should have been straight forward but due to the ring and pinion mesh being way too tight, I had to strip and rebuild them a couple of times having first removed a small amount of material from the back of the pinion gear to reduce the preload. I think I removed about 0.2mm from each pinion (The ring and pinions are cheap chinese ones not genuine axial ones). With the adjustments made and the bearings and gears all greased up both axles spin nice and freely with no binding or excessive back lash.

Next up will be to finish the U-bolts and spring plates and build up the rear spring packs, then the springs can be installed onto the axles and the axles onto the chassis.

More soon, and thanks again for looking in on the thread.

02-25-2018, 10:07 AM
Pete, you are a real builder. There's always something pretty interesting going on in your threads. Thanks for sharing your progress with us all.

02-25-2018, 11:56 AM
Pete, you are a real builder. There's always something pretty interesting going on in your threads. Thanks for sharing your progress with us all.

Thank you Sir, I am happy that folks find my tinkering interesting, and glad to share in the hope it might inspire others.

03-01-2018, 09:46 AM
Excellent build Pete! I am a big fan of that build on Pirate 4x4 and cannot believe the detail you are putting into this. Hats off to you sir. I hope one day i can build something half as good as this build!

03-04-2018, 09:28 AM
Excellent build Pete! I am a big fan of that build on Pirate 4x4 and cannot believe the detail you are putting into this. Hats off to you sir. I hope one day i can build something half as good as this build!

Thank you, glad you like the build, and as you say the 1:1 is a really nice build too, I hope I can catch the overall feel of the 1:1 buy the time i'm done.

Today brought some more progress, things went slower than I hoped, but I have managed to get the springs attached to both axles and just need to fab and attach the rear shackles and the chassis will be a roller.

Look on jackstands holding it up.



I managed to more or less replicate the 1:1's spring plates and U-bolts, Making the spring plates stepped to keep the end of the bolts from hanging down took some thought and a couple of failed attempts before I got something that works.



Having the axles located in their final position means I can now finally get back to mounting the motor/trans into the chassis. Last bit from today was to start mock up of the location of the motor/trans to see what the clearances are like, was pleasantly surprised by just how much space is currently available under the hood. Mind you that is a 380 motor not a 540.



So next visit to the shed should result in some motor/trans mounts and then body mounts.

More as and when it happens.

04-02-2018, 09:55 AM
Managed some more time on the Willys today.

Remade all the leaf spring shackles, as I wanted to use M2 hardware instead of M3, much happier with the look now. Also got the shocks mounted.






I am so glad that SDI propshafts can be cut nice and short ;)



Full tuck at the front, 1mm clearance to underside of fender.


I thought this was appropriate it being so small ::D:


Next, I will finally finish making the engine and transmission mounts and attaching them to the chassis and attaching the steering servo, I promise. The last piece of the electronics should arrive this week so once all the mechanical bits are in place I shall be on to the electronics.

More soon, Thanks as ever for looking.

04-03-2018, 01:43 PM
Woot. I finally got the motor and transmission mounted this evening also cut the props to length and fitted them.




Also printed a new windscreen frame, (I will be modifying this to look more authentic)


More soon.

04-05-2018, 01:44 PM
Didn't feel like doing difficult stuff tonight, so bent some tube to start the rollcage.

The 1:1 has a nice simple design, I may add a diagonal brace in the rear hoop just for strength.


this is what I came up with so far.



Hopefully I can get the rest of the tubes cut and bent tomorrow.

04-07-2018, 11:11 AM
Another day and more bent bits of metal ::D:

First off I ended up making a new windscreen frame from steel as I really didn't like the printed one (to big and not really the right shape around the hinge point)



Also managed to finish up the cage.



If I can get some time in the shed tomorrow I shall mount the steering servo and start hiding the electronics and battery.

More as it happens.

Thanks as ever for taking an interest.

04-08-2018, 09:05 AM
So, Servo is in just need to make the drag link.





once I make a radiator it should be fairly invisible, especially from the front.

Also made this, can you tell what it is?


04-08-2018, 09:15 PM
Man I am a sucker for a jeep build, but this thing is just awesome.

04-11-2018, 01:01 PM
Man I am a sucker for a jeep build, but this thing is just awesome.

Cheers, I'm not a huge jeep fan but have a real soft spot for the Willys MB and 'Rango' in particular.

Managed an hour or so int' shed tonight.

made a start on the windscreen, going with styrene for this.


Also started to paint the seats. These are 3D printed from a desgin I found online and modified.


Still need a bit more sanding before final paint.

Whilst the paint was drying I threw the electronics on


and gave it a quick test.


More soon. Thanks as always for taking an interest.

04-11-2018, 04:48 PM
That's the thinnest servo I've ever seen! Wow dude, so much amazing happening here.

04-11-2018, 11:50 PM
That's the thinnest servo I've ever seen! Wow dude, so much amazing happening here.

The servo is a wing servo (with the top tab cut off). It was a bit of a lucky find as it's apparently capable of 11kg @ 8.4v and is metal geared.

Getting it running was a nice boost, and also means I can get on with the scale bits, safe in the knowledge that the mechanical bits work.

04-12-2018, 03:54 AM
that bit you made is a steering box correct

04-14-2018, 01:48 PM
that bit you made is a steering box correct

It is indeed. It will only be set dressing rather than functional

Today I got some interior mock up done.




Looks like everything should fit, just need to make a transmission tunnel and the fuel tank/electronics box and find some way to hide the battery and then I can start on paint and final assembly.

04-22-2018, 11:49 AM
More detail stuff done today

Managed to squeeze the 8274 in the front (the 1:1 has a belleview which is a smaller version of the same winch) and got the faux steering box to fit (I dont like the oversize nut on the top of the box and will be changing it)



Made a radiator


The servo will be getting a coat of silver paint and I will also add a fan as per the 1:1

Painted up the steering wheel, just need to make a column for it and then I can attach it. Also worked out how to fix the seats down (has to be done after the body is attached to the chassis.


Hinged the hood and roughed out the cut-out for the air cleaner



Lastly made the fuel tank/electronics box and figured out how to attach it.



It is I feel really starting to come together and I like what I see.


More as it happens,

04-29-2018, 08:15 AM
Been plodding along sorting details pieces on this as and when I get a few minutes. Finally got the the handles on the body made and installed, yes the drivers side one is missing it should be as it's not on the 1:1. Also got the shovel and axe installation sorted out.





once everything is painted I will install the hold down strap for the shovel.

Started on the electronics install. The ESC, RX and light controller all fit in the fuel tank, however the winch esc is going to have to go underneath as the isn't enough room for it too. i made sure the on/off switch is accessible.


Lastly for this week I managed to find an M2.5 Nyloc in the box of random nuts and having drilled and tapped it to 3mm installed it on the steering box. It may only be half a mm smaller but I think it looks a lot more correct.


More next weekend (Hopefully get some paint on the body this week.)

04-29-2018, 08:48 AM
The stance on this thing is ::2thumbs looking forward to seeing some paint on it

05-05-2018, 12:40 PM
The stance on this thing is ::2thumbs looking forward to seeing some paint on it

Thanks It's been a challenge to get the stance right and make everything fit and work.

The wait for paint is officially over.

I spent the afternoon preping and painting this. Ended up using a spray acrylic paint rather than brush painting, as it gives a better finish. I used Kobra Pistacchio which is a bit lighter than ideal but is a good olive drab colour. The Kobra paints are great as they also dry really fast (I think they are formulated for graffiti art)

So painted the main body, and then worked out what has been bugging me about the rear light position right from day one, they are to high and to far out on the body. So I filled the original holes and made new ones lower down and in as far as I can push them.



Much happier with this new position. I just need to mount the rear lights now.


The front end is now all together, just need to hook up the lights and the winch controller.


I managed in the week to print some gauges, so these got painted and installed. Also added the starter button and handbrake lever.


I also made a start on the gear levers, I just need to make a gaiter and some knobs and I can install them.

Lastly the printer also produced some of the makings of a motor cover, in the form of a V6. Still need to print some more bits (once I have drawn them) and then give it a coat of paint before installing it.


More soon, as I want this finished and at least run once before the UK G6 at the end of the month.

Thanks for stopping by, see you soon.

05-08-2018, 12:49 PM
Few more details done,



I don't really like how far back on the manifold the carb is, but to get the hole in the hood to be in the right place that is where it had to land. The 1:1's engine lives a fair bit further back in the engine bay than I can get this one to sit and still hide the motor. Next will be some pedals and the gear levers, then it's just joining all the wires together and pray that the magik smoke doesn't escape :)

05-13-2018, 09:01 AM
Had an exhausting afternoon in the fabshop :)

http://i.imgur.com/NMWX7v4.jpg (https://imgur.com/NMWX7v4)

Actually made good progress, as most of the electrics are now in, just need to connect a few things together.

Gear levers and pedals in (need to make some gear knobs)


got the winch esc in and hidden.



the hole is to allow access to the programing button.



The rest of the electrics are nicely hidden in the fuel tank.


The cage is now reinstalled for the (hopefully) last time, although I still need to bolt the body back down, but until the exhaust is done I shall leave it un-bolted.

More soon.

05-18-2018, 01:01 PM
Got a little more done on the exhaust over the last couple of evenings.

Second manifold sorted.


Y pipe also complete.


view from underneath


Just need to sort the rear section and that will be another item off the list.

The body is finally bolted back down as well, so I can finish hooking up the electrics, so fingers crossed it should be pretty much done by the end of this weekend.

05-20-2018, 01:04 PM
All the electrics are hooked up (some of them twice) and tested, I have hidden the wires as much as I can.


added a couple of hold downs for the hood.


Also nearly completed the exhaust just need to make one flange and a couple of hangers.


lastly some outdoor shots to show it's true colour.





The last thing I really want to get done before next weekend is to make something to cover the battery as it has to live in the rear tube it would also be nice to get some wipers on the screen but we shall see.

05-26-2018, 02:24 PM
This had it's maiden run today @ the UK G6 recon. happy with way it performs and can see where I need to tweek a couple of things to improve it. I managed a very short video clip of it on a steepish rock climb.


It also got awarded the best engine bay by Brian in the 'show and shine'

Thanks as always for popping in to take a look.

05-28-2018, 12:50 PM
The 1:1 that this is based on has some deep dish beadlock wheels on it, which I wanted to figure out how to replicate. First off I 3D printed some fake beadlock rings and painted them black and hilighted the bolt heads in silver. Next I purchased a set of RC4WD 1.55 5 Lug OEM steel wheels and stripped the paint off them, and added a fake valve stem. The beadlock ring was then glued to the rim of the deep section of each wheel and the whole lot was given a few coats of clear lacquer to protect it.


next all the hubs were machined on the lathe to reduce the offset (as well as using 4mm hexs).


The wheels were then built up using the scrambler tires and the fronts got a few wraps of lead solder to add abit of weight to the front end.




I hope this week to finish up the last few details such as the bikini top, fake brake discs, drive battery cover and installing the 3d printed battery under the hood.

More as it happens.

06-02-2018, 10:58 AM
A few more details have been added during this week,

Bikini Top = done

battery cover = done

rear view mirror = done

Wipers = done

Brake disks = still to do

Scale tat = mostly done, might add a ammo can or something in the back and some junk in the glove box.








I also need to look into the ESC settings when I get 5 minutes, but I think I am calling this as complete, next I will have to give it a good run and get some better video and pictures of it.

06-17-2018, 11:41 AM
Test run yesterday.

Good points, suspension works well and it's very stable on climbs and sidehills.

Bad points, snapped a lower shock mount off the rear axle and cooked the tamiya 380 sealed can motor due to the gearing being to tall and 3S battery. I already have a solution for the motor and just need to braze the mount back on so should be up and running by the end of the week.

Some pictures courtesy of Grubbybuz.







Thanks as ever for looking.

06-17-2018, 12:00 PM
Awesome stuff Pete! Much pleasure had in seeing this on the trail.

06-18-2018, 07:15 PM
Looks excellent, I want to do a big tire Willy's now. Great job :biggthumpup:

Willys Wheeler
09-21-2018, 07:30 PM
Awesome Jeep. Do you have any advice on that transmission build? I have a gmade sawback Willys and would eventually like to move the motor up under the hood for a better body.