04-21-2018, 06:00 AM | #1 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Homemade 8x8
Building my first 8x8 .. decided to go with AR60 axles and 2.2 wheels. So far so good. The chassis is looking awesome in my opinion and am starting with the drive train. Will be using an SCX10 transmission case with Robinson Racing gears - which will feed a homemade transfer case to feed each axle individually. The 2 axles closest to the middle of the truck will have the pinion spin in one direction while the end axles will have their pinion spin in the opposite direction, thus eliminating torque twist completely. Below find two links: Here's a link to my page where you can find pictures showing where I am with the build so far and the second link to a YouTube video showing you how I made my 3 way transfer case. Enjoy https://joesrccargarage.yolasite.com...d-progress.php Last edited by JoeConti; 05-12-2018 at 09:02 AM. |
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04-21-2018, 05:02 PM | #2 |
I wanna be Dave Join Date: Apr 2013 Location: Streamwood, IL
Posts: 2,442
| Re: Homemade 8x8
What body are you planning on using?
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04-21-2018, 07:29 PM | #3 |
RCC Addict Join Date: Mar 2011 Location: Way out there!
Posts: 1,465
| Re: Homemade 8x8
I have been wanting to try counter rotating shafts on a six by. Looks like your going to put it to the real test at both ends. I'll be keeping an eye on this build. Nice work.
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04-22-2018, 11:43 AM | #4 | |
Quarry Creeper Join Date: Apr 2012 Location: Harrisburg
Posts: 340
| Re: Homemade 8x8 Quote:
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04-22-2018, 12:37 PM | #5 | |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8 Quote:
There's new pictures at the very bottom of this page at this link https://joesrccargarage.yolasite.com...d-progress.php | |
04-22-2018, 01:26 PM | #6 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Homemade 8x8
Nice setup. I like the transfer case design and how you are driving the axles separately.
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04-22-2018, 11:52 PM | #7 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8 I figured that in a real life scenario I would have wanted my truck to be the same - I would not want my ending the trail to depend on one drive shaft driving both axles and depending on that setup in the middle of nowhere, plus they spin in the opposite direction cancelling out all torque twist - imagine a pull-pal event with that ;)
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05-08-2018, 05:17 PM | #8 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,482
| Re: Homemade 8x8
Very cool build! Thanks for sharing. I see 2 motors now |
05-09-2018, 01:53 PM | #9 |
Newbie Join Date: Dec 2017 Location: Las Vegas
Posts: 46
| Re: Homemade 8x8
Extremely informative video! I really appreciate the depth of coverage and the explanations of the engineering.
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05-11-2018, 02:43 PM | #10 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8 |
05-11-2018, 02:43 PM | #11 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8 |
05-11-2018, 02:44 PM | #12 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8
Progress so far |
05-12-2018, 09:18 AM | #13 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8
Next up is the steering .. I have the front 2 axles working on one servo but I am not happy with the way it performs .. it is not correct and has to many things that can go wrong. Take a look at my video here. I am looking for a better solution and today I saw a video which showed a better solution and which apparently is more realistic. I will update you all with the progress of the new steering system as soon as I have something to show you |
05-12-2018, 12:08 PM | #14 |
RCC Addict Join Date: Aug 2008 Location: Paulina
Posts: 1,213
| Re: Homemade 8x8
If you want to run 1 servo, I would look into mounting some Bellcranks to one side of the chassis, 1 per axle, then connect the drag links to the bellcranks. Take a look at this one for example. Jebster's 10x10 HEMTT rollback hauler |
05-12-2018, 02:59 PM | #15 | |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8 Quote:
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05-19-2018, 02:12 PM | #16 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8
While waiting for parts, I decided to give the body a go. Here's what I did so far. This is the way I would like this build to go but then it is all subject to change if need be: |
06-21-2018, 06:40 AM | #17 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8
An update: Replaced the steering system. Old one was not mechanically sound and nor did it make sense, so now I've done some research and gone full on scale - here,s what I used: Scale steering boxes (you may call them something different) and here's what they look like installed: and here: |
06-21-2018, 06:42 AM | #18 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8
..... also made this video showing the old and the new steering system plus, the new system functioning Enjoy |
06-23-2018, 02:34 PM | #19 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8 |
06-23-2018, 02:37 PM | #20 |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Homemade 8x8
Today I took the truck out for a test run. Drained a 3S 6000mah and gave it my all. it was do or die. I don't want something delicate, I want something robust and that can perform well. Here's what happened: |
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