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03-13-2018, 08:14 AM | #21 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
A short video showing my first test of the screw drive system I'll be using for the rollback feature. https://youtu.be/PxkhIfYlN48 |
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03-13-2018, 12:40 PM | #22 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
Also got a set of shocks to try out. I really like the small diameter and the resevor adds a nice look but they are a pain to bleed. Still not sure I did it right. I bought two pairs but I'm not sure I'm going to buy 3 more.
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03-15-2018, 02:56 PM | #23 |
I wanna be Dave Join Date: Jun 2006 Location: Here
Posts: 2,319
| Re: Jebster's 10x10 HEMTT rollback hauler
Looks great sofar. You wouldnst happen to have a link to the shocks?
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03-15-2018, 04:38 PM | #24 | |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
I don't have a link but you'll find them on ebay if you search for xtra speed 70mm piggyback shock. Just so you know I'm not happy with the shocks and will be getting something different. The reservoir diaphragm has no seals so it leaks. Plus getting the tube to stay connected on each end is tough. I ended up putting some heat shrink tubing on the small nozzles so the the tube had something to hold onto. | |
03-16-2018, 01:36 PM | #25 |
I wanna be Dave Join Date: Jun 2006 Location: Here
Posts: 2,319
| Re: Jebster's 10x10 HEMTT rollback hauler
I found some pretty neat 70mm shocks on feebay for like $22 for 4 and they work pretty well. Unsure of the name but they're blue
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03-24-2018, 10:32 AM | #26 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
More work on the rollback mechanics. Pretty much complete. You can see the white delrin blocks that the channels on the underside of the bed deck will slide on. Also started thinking about the transmission options. I have a GRU I might try. Do people have any issues with these handling brushless power? https://youtu.be/PxkhIfYlN48 https://youtu.be/fLwiAiLo8-o |
03-24-2018, 07:44 PM | #27 | |
Quarry Creeper Join Date: Apr 2012 Location: Harrisburg
Posts: 340
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
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03-24-2018, 08:07 PM | #28 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler I believe the novak can run on 3s since it was paired with a goat 3s esc originally. As far as a brushed motor being smoother I have had a similar experience but a good sensored brushless does pretty well.
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03-25-2018, 11:37 AM | #29 | |
Quarry Creeper Join Date: Apr 2012 Location: Harrisburg
Posts: 340
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
Sent from my HTC Desire 626 using Tapatalk | |
03-25-2018, 01:49 PM | #30 | |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
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04-14-2018, 01:47 PM | #31 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
Continuing to make progress. I have all the suspension set up including the front two axles panhards and drag links. Got the rollback structure mounted to the frame and it tilts nicely. I also made some crossmembers to eliminate flex. Cut out the bed to size it up. Width is good but I need to shorten it up to around 21-22". The only issue I'm having is picking shocks. I need 10 so I'm trying to find shocks that won't break the bank. They need to be either 60mm (compressed) - 75mm (uncompressed) or 70mm - 85mm. Not finding much. Getting close to needing the cab. I may need to make it myself! |
04-14-2018, 02:58 PM | #32 | |
Quarry Creeper Join Date: Apr 2012 Location: Harrisburg
Posts: 340
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
That being said, my builds take forever because I am too critical of my own work when scratch building with styrene. It has to be anatomically correct or not at all. Sent from my HTC Desire 626 using Tapatalk | |
04-14-2018, 03:25 PM | #33 |
I wanna be Dave Join Date: Apr 2013 Location: Streamwood, IL
Posts: 2,442
| Re: Jebster's 10x10 HEMTT rollback hauler
Shouldn't have any flex with those beefy crossmembers |
04-22-2018, 03:27 PM | #34 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
More progress. Got the rollback mechanics all functioning. Instead of adding a mechanical tilt I'm going to see if gravity can do the job. I added some shocks filled with 5k diff oil to make the tilt more controlled and prevent it from slamming around. I also included limiting straps to prevent the shocks from being over-extended. At the back of the bed there are some rollers I made that allows the bed to roll out once it contacts the ground. I also mounted the steering servo so that is all working. Getting to the point I will have to start working the body. https://youtu.be/I_BDScTOqNU |
05-12-2018, 03:50 PM | #35 | |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
You over simplified the ideal way for a 2 axle steering. Funny when one tries to do something one tends to over engineer it .. but you have managed to make it so simple May I ask if you have a link to those steering boxes ? I see you are running SCX10 axles with what I am assuming are 1.9 wheels. Wondering if the steering boxes will hold up to AR60 axles with 2.2s. Found some Hot Racing steering boxes. Not in the mood of spending $60 for a pair. Wondering what you paid for yours. | |
05-12-2018, 06:08 PM | #36 | |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
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05-13-2018, 01:22 AM | #37 | |
Quarry Creeper Join Date: Jul 2014 Location: Malta
Posts: 345
| Re: Jebster's 10x10 HEMTT rollback hauler Quote:
Job well done | |
11-02-2018, 07:20 PM | #38 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
I have been makings progress and will post of pics and a videos soon. In the mean time I have a question for others. I didn't expect a tight turning radius on a rig this long but I wanted to know if running open diffs (vs lockers) in the front two steering axles would improve things noticeably.
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11-03-2018, 09:36 AM | #39 |
I wanna be Dave Join Date: May 2010 Location: The east coast
Posts: 2,599
| Re: Jebster's 10x10 HEMTT rollback hauler
Here is a videos of the rollback bed in action. The twin hammers on the back is no lightweight and it does fine. https://youtu.be/Y92G1fkgL9Q As you can see in the video the rear axles need heavier duty springs. They are buggy shocks so the springs are soft. I did have a causality. The output on my GRU snapped off. Trying to decide if I'll buy another unit or fabricate my own. I need a LOT of reduction since the transfer cases I'm running increase the output ratio. |
01-28-2019, 02:59 PM | #40 |
Rock Stacker Join Date: Oct 2014 Location: Raeford
Posts: 84
| Re: Jebster's 10x10 HEMTT rollback hauler
Been working on this body for some time now. Started with someone else design but didn't like allot of it, so doing my own. Think I'm going to make it a go anywhere camper. Like your ideas. Going to use that steering idea in the rear. Started out was going to be 1/16 with WPL axles. Now I've decided to do SCX10 axles, with one set coming from a scrapped AX10 Crawler. Hope you don't mind showing these in your post. The different colors are for me to help distinguish the differ parts. |
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