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Thread: Trail rig on the budget - Custom Unimog

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Old 08-09-2018, 04:59 AM   #1
Quarry Creeper
 
Join Date: Sep 2017
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Default Trail rig on the budget - Custom Unimog

Yes! Another budget conscious build. I need a trail rig, my D90 is too slow and my FY03 is just too small.

Been looking at whats available and decided to start gathering parts. Axles will be the silly old HG’s. They are performing well on my heavy D90 and seems solid on the Woman’s rig. And for what Banggood sells them at you cannot complain. Just add bearings.

The list thats on order/getting shipped at the moment:
Silly HG axles
JX 20kg servo
Xtra Speed rod ends
Xtra Speed helical gear scx10 gearbox
Xtra Speed ‘stainless’ punisher drive shaft copies
QuicRun 1080
Axial Y-links
Tamiya Unimog 406 body.

The chassis might be a china D90 effort or it might be laser cut.

Got some shocks and wheels that will be used.




Now to wait for the postal service to do its job.



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Body came in.


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Got the cab split from the bed. Had a gander at it on a d90 chassis and don’t like the length. I prefer the swb look. Got auto-cad sparked and drew up a swb scx10 based chassis. Its getting cut at the moment.

Loving Aliexpress with their buyer protection again. The build is almost halfway sponsored by them atm...

Servo will be axle mounted too as I’m not going to fight with cms link lengths.

Some chassis parts done.



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Last edited by THX_138; 12-20-2018 at 03:13 PM.
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Old 09-10-2018, 09:36 AM   #2
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Default Re: Trail rig on the budget.

Wish I could have some plate chassis’ cut.
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Old 09-10-2018, 09:42 AM   #3
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Just send a cad to someone that can lasercut. Its painless.


Some more parts came in.

I can highly recommend those Xtra Speed rod ends. They are tougher than the Revo

Still waiting on local postal service to deliver.

In the meantime I have chatted with friends and have been convinced to get some axles from Banggood:

I will get these and some Alu ScX10 hardware and skid plate too. Just going to slam it with heavy axles now. The wheels are quite heavy already.

If all goes well my gearbox should be in my hands within a month. South African Post Office is sitting with a 10mil package backlog....

At least the axles will be delivered within 3 weeks with direct mail.

Cant wait to start laying out the rig.

I have some DS Servos on the way too.


Looking for some opinions on motor choice.

I would love getting a trail master but availability locally is a bit bad. I would like some decent wheels speed but enough control for basic crawling on the trail. Mabuchi 27t motors are plentiful though and might just be the option for now?

Whats do you guys think I should do with the china scx10 gearbox and cnc axles?


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The Chinese Helical SCX10 Gearbox arrived.

Stripped it, greased it and thread locked the screws. Also replaced the screws with SS.





Had to shim the input shaft with 1mm.


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Last edited by THX_138; 12-20-2018 at 03:15 PM.
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Old 11-27-2018, 11:38 AM   #4
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Default Re: Trail rig on the budget.

Quote:
Originally Posted by HugoBiermann View Post
Looking for some opinions on motor choice.

I would love getting a trail master but availability locally is a bit bad. I would like some decent wheels speed but enough control for basic crawling on the trail. Mabuchi 27t motors are plentiful though and might just be the option for now?

Whats do you guys think I should do with the china scx10 gearbox and cnc axles?


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I run 27t and 35t motors on my rigs on 3s. It seems to be the magic combo for wheel speed and control, If its too fast just gear down.....
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Old 11-29-2018, 11:30 AM   #5
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Thanks for that. I’ll grab me a 27t then as I’ll be running 7.2/4 volt.

Should have axles soon.

Painted the chassis earlier.



Got some chassis work done. Waiting on the last parts to rock up next week.

Motor is an unused Johnson 27t out the back of the .drawer for now.

These axles are really awesome for the price. Just needed the tread lock treatment.







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Last edited by THX_138; 12-20-2018 at 03:16 PM.
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Old 12-01-2018, 07:42 PM   #6
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Default Re: Trail rig on the budget.

How are you liking those axles?

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Old 12-02-2018, 12:23 AM   #7
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Default Re: Trail rig on the budget.

Thus far I’m really impressed by the axles. CG is better with them too.


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Old 12-02-2018, 01:47 AM   #8
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Default Re: Trail rig on the budget.

How smelly are those tires? I need some tires to use as spare tires on the body. I bought the Austar versions, but they are way too strong smelling compared to other tires.
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Old 12-02-2018, 02:53 AM   #9
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Lol. Don’t have an overwhelming rubber smell. Theres 8 of them lying around and its all cool.

Had it out for a test run quick. Climbs huge inclines and feels nice all round for now.




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Last edited by THX_138; 12-20-2018 at 03:17 PM.
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Old 12-02-2018, 03:07 AM   #10
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Default Re: Trail rig on the budget.

How about those shocks? I've been wondering about those too

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Old 12-02-2018, 03:11 AM   #11
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Default Re: Trail rig on the budget.

Shocks are really nice too. Doesn’t leak too much. Way better than anything else I run. I fill them 3/4 of the way with 42w oil and its nicely damped and responds good. The 80mm on the front carries the weight brilliantly.


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Old 12-02-2018, 12:00 PM   #12
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Default Re: Trail rig on the budget.

Quote:
Originally Posted by HugoBiermann View Post
Shocks are really nice too. Doesn’t leak too much. Way better than anything else I run. I fill them 3/4 of the way with 42w oil and its nicely damped and responds good. The 80mm on the front carries the weight brilliantly.


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Want to run 70mm on 1/16 wpl what's the diameter of the shocks and can you take the middle space off ?want to run internal springs.


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Old 12-02-2018, 12:38 PM   #13
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The springs are the same as Tamiya’s. 14mm?

They can be stripped completely. Internal wont be a problem.


Body painted and got the basic decals on. Hinged body mount. Now to figure out a basic cage and some sort of floor and gearbox cover.



Got a backyard cage on and took it out for a test run. The cvd drive shaft on the back lost a pin and all of its innards. Waiting on a punisher copy now... was worth a try...





Ok. So after looking again I found a grub screw in the cvd that holds the pin. Never too old to lean, hey. Should have noticed that earlier. Anycase, its all stud locked up now. Should hold till the other shafts get here.







The backyard cage is made of brass tube and I thought it would still mess with the cog but it seems fine. Had it out for a bit and it climbs awesomely. Side hill driving is good too. Front shocks are 80mm with 40wt half way. Nice and soft but still controlled. The back shocks are 90mm with 40wt till the top because of the angle. Its responds slow enough to hold the front down while not having to preload.

Nothing to say about the 1080. We all know what it can do. The 27t Johnson is actually working ok for now. Only got slightly warm and got the rig through everything I aimed it at.
Thus far the china swampers are gripping like beasts. Will see how long they will do that still.

Whenever the local distributor shows stock on some HH 27T’s I will get one. The JX servo will get swopped as soon as I get the DX’s. And I will also address the horrible steering links that came with the axles when I fit the DX.


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Last edited by THX_138; 12-20-2018 at 03:19 PM.
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Old 12-10-2018, 07:23 PM   #14
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Default Re: Trail rig on the budget.

Great budget build. I have a set of those axles on my loaner rig. They've handled some serious abuse. I'm a big HH fan, but when I go cheap, I go with a YeahRacing Hackmoto. Only around $17 USD, rebuildable and performs great.
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Old 12-11-2018, 12:58 PM   #15
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Default Re: Trail rig on the budget.

Ive got some Austar/Hobbypark motors and locally they are a couple of Rand (probably around $3) cheaper than Trailmasters. Only problem is availability on either of them.


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Old 12-13-2018, 12:51 PM   #16
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Default Re: Trail rig on the budget.

Servo and link changed.



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Old 12-16-2018, 10:18 AM   #17
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Default Re: Trail rig on the budget.

Had it out yesterday. Did really well. Had only change on the 1080 was to change the initial start to 1 from 9. Also dropped the battery tray to behind the front shock towers to help aid in downhill weight balance. Was a bit front heavy with the battery between the front towers. Also dressed the body a bit better behind the cab and got rid of the gearbox cover for now. Will think about it again when I kill this cage.

Tires lacked a bit in the sand. Prolines will make a difference, but local availability is a problem. I can get hold of some Louise CR Champs(Duratrax Deep Woods) that might be be an option too.

3.5hrs on a single 5000mah NiMh stick.








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Old 12-20-2018, 07:31 AM   #18
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Default Re: Trail rig on the budget.

Swopped out the useless China CVD drive shaft in the back for a Xtra Speed ‘Punisher’ Shafts. Binding gone and I feel a lot better with the much larger grub screws.
At least the front and rear is exactly the same now...





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Old 12-23-2018, 05:39 AM   #19
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Default Re: Trail rig on the budget.

Went out with the club again yesterday. Rig is really capable. Just waiting for the LHS to get stock on some Louise Champs and it should be running really awesomely.









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Old 12-23-2018, 11:41 PM   #20
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Default Re: Trail rig on the budget - Unimog

Thanks. Have to change it up on the trails. Everyone is always running the same or similar rigs.


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