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  1. #1
    RC Turnbuckle Jr. Greatscott's Avatar
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    Greatscott's TRX-6

    Well, it is official, finally got my hands on a TRX6.

    I was going to wait for a kit version, but I got trigger happy. I figure now that I have bought the RTR, Traxxas will drop the kit in about two weeks, that's normally how my luck runs on these kinds of things... Oh, to be cursed with first-world problems...

    I just took it out of the box, and without any driving experience with it I can say that it is an impressive beast. I have never been a Mercedes fan, but this thing does look good. I really like that Traxxas did justice to this rig by all of the detailing it did on the body. The door handles and door bumpers are all parts and not stickers, the Mercedes emblem on the hood looks proper, and the lighting detail is superb.

    Untitled by Scott O, on Flickr

    As impressive as this rig is, there are a couple of initial annoyances with it. First, there is no place to rout a winch, which is standard equipment for all of my rigs. Second, I wish they would have made the mid-axle differently, allowing for the back axle to be exactly the same as the TRX4.

    Untitled by Scott O, on Flickr

    That is about all I can say about it until I get this beast on the rocks.
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  2. #2
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    Wow very nice, i love it in silver, only another month till i get mine here in the uk.

  3. #3
    RC Qualifier USMC1984's Avatar
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    I finally got mine last Wednesday...I haven't had it out yet either...maybe this coming Wednesday when I have a day off?

    This this looks pretty good! I got Grey as well.

    I gotta admit though that my excitement for this is a bit muted due to the anticipation of the new Maxx!

    I kinda think the Maxx is gonna replace the Rustler for me as my all around favorite, but we'll see!

  4. #4
    RC Turnbuckle Jr. jamann's Avatar
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    Quote Originally Posted by Greatscott View Post
    Well, it is official, finally got my hands on a TRX6.

    I was going to wait for a kit version, but I got trigger happy. I figure now that I have bought the RTR, Traxxas will drop the kit in about two weeks, that's normally how my luck runs on these kinds of things... Oh, to be cursed with first-world problems...

    I just took it out of the box, and without any driving experience with it I can say that it is an impressive beast. I have never been a Mercedes fan, but this thing does look good. I really like that Traxxas did justice to this rig by all of the detailing it did on the body. The door handles and door bumpers are all parts and not stickers, the Mercedes emblem on the hood looks proper, and the lighting detail is superb.

    Untitled by Scott O, on Flickr

    As impressive as this rig is, there are a couple of initial annoyances with it. First, there is no place to rout a winch, which is standard equipment for all of my rigs. Second, I wish they would have made the mid-axle differently, allowing for the back axle to be exactly the same as the TRX4.

    Untitled by Scott O, on Flickr

    That is about all I can say about it until I get this beast on the rocks.
    I think because of the portals they had to reverse the rotation on the rear.so needed to have the ring gear on the other side.

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  5. #5
    RC Turnbuckle Jr. Greatscott's Avatar
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    Greatscott's TRX-6

    Quote Originally Posted by jamann View Post
    I think because of the portals they had to reverse the rotation on the rear.so needed to have the ring gear on the other side.

    Sent from my SM-G973W using Tapatalk
    Given that the pass-through for the pinion on the center axle is on the same side of the input, the back axle has to be flipped so that the wheels rotate in the correct direction, this is common on all 6X6s. I was hoping Traxxas would have put the output of the center axle on the opposite side of the ring gear from the input, this would have allowed them to use the same back axle as the TRX4, which would be less unique parts between the TRX4 and TRX6. I am guessing that the engineers likely looked at this and decided this was the best option.

    Anyhoo....
    Just bought my Mamba-X to go in this thing, but my LHS did not have the 1900kv motor to go with it. So, I need to find a motor to go with this. Might try an HH motor, I am thinking a Trail Master Pro 2200kv. The Puller Pros are very nice, but I think is more than what is needed for this rig, and a lot more expensive.

    After I fire this thing up, get some rocks under it and make sure everything works I will rip its guts out. Starting with the ESC and motor, then a 400oz servo, and a RX for my RX5R. In the mean time, I got to figure out how to get a winch on this thing.

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  6. #6
    RC Turnbuckle Jr. Greatscott's Avatar
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    Just got a little bit of testing in to make sure everything works (it does). Yup, this thing is fun, I ran around for a good amount of time without needed to lock the diffs.

    Wanting to see the difference having the diffs open and locked made, I set up a quick test. I set the truck up on concrete to give the most amount of grip on the tires. I set the truck up in the exact same place for each run, I turned the front tires hard left, and slowly turn the truck around until it was 180 degrees out from where it started. Here are the results...

    All unlocked: 29"
    Front locked, back unlocked: 38"
    All locked: 56"

    With this, I am thinking when I cut over to my DX5R, I will spool up the front and leave the back selectable.

    The test:
    Untitled by Scott O, on Flickr

    Diffs Open:
    Untitled by Scott O, on Flickr

    Front locked, back open:
    Untitled by Scott O, on Flickr

    All locked:
    Untitled by Scott O, on Flickr
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  7. #7
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    do you see any chance to mount a tow hook like this?


    in any way?

    can't wait to get my hands on this car... but here in germany we have to wait till end of october

  8. #8
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by thaclone View Post
    do you see any chance to mount a tow hook like this?


    in any way?

    can't wait to get my hands on this car... but here in germany we have to wait till end of october
    It can be done easily, and there are a couple if options for doing it. The easiest thing would be to remove the back skid plate and install a chassis-mounted hitch receiver.

    If you want to keep the back skid, you could try mounting the chassis-mounted hitch and punch a hole in the skid for the hitch to go through, there might be clearance issues between the receiver and skid.

    Another option is to get another bumper with a receiver built into it, but you might have to trim the body.
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  9. #9
    RC Turnbuckle Jr. Greatscott's Avatar
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    Got some reasonable run time on my back yard crawling course. I am impressed how well it crawls with the diffs unlocked, a couple times it got stuck and had to remind myself to lock the diffs. Until I switch over to the Mamba-X, I need to set the ESC up for mode 5, roll-back killed me in a couple of spots.

    The biggest surprise was checking the motor temp after about 45 minutes and it not being over 100deg/f.

    It is no surprise that the servo needs to be replaced. The 2075X isn't bad for what it is, but it just doesn't have the power needed for the TRX platform.

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    My greatest disappointment was when I tried going up Winch Hill, it just wouldn't get all of the way to the top. I was hoping that it would make it, but the whole reason this feature is in my course is to practice winching while the truck wants to roll backwards.

    Untitled by Scott O, on Flick

    Here are a couple of videos I shot as well. Please don't judge this truck by my driving skills, I cleanly and neatly got through this course before I started recording...

    https://www.youtube.com/watch?v=2A9ZBl7ZXP0

    https://www.youtube.com/watch?v=I9UuXnuhvU8

    And, just for fun, my cable slide...

    https://www.youtube.com/watch?v=H78PC7jRFfE
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  10. #10
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    Just what you needed greatscott, lol. Another trx is always great to have. Wonder what other bodies we'll all see for this trx6

  11. #11
    RC Qualifier USMC1984's Avatar
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    Quote Originally Posted by Bike mechanic View Post
    Just what you needed greatscott, lol. Another trx is always great to have. Wonder what other bodies we'll all see for this trx6
    I'm not holding my breath on the bodies. Still can't get much for the Rusty!

    Because of the body thing, I decided the Defender will still be the shelf queen and the TRX-6 will be the runner!


    Now...I just gotta learn how to crawl!

  12. #12
    RC Qualifier USMC1984's Avatar
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    BTW, cool track GreatScott! Is it yours?

  13. #13
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by Bike mechanic View Post
    Just what you needed greatscott, lol. Another trx is always great to have. Wonder what other bodies we'll all see for this trx6
    Given that Axial just produced a 6X6 as well, someone is likely going to jump in and produce bodies for them. Heck, the Axial 6X6 body might work on the TRX6, and vise-versa.

    Quote Originally Posted by USMC1984 View Post
    I'm not holding my breath on the bodies. Still can't get much for the Rusty!

    Because of the body thing, I decided the Defender will still be the shelf queen and the TRX-6 will be the runner!

    Now...I just gotta learn how to crawl!
    I don't think you are looking it the right spots for Rusty bodies. That is one of the more popular trucks out there.

    Quote Originally Posted by USMC1984 View Post
    BTW, cool track GreatScott! Is it yours?
    Thanks! Yup, built it last year. Was planning on throwing more on it this year, but I never got around to it. Here is my thread on it...

    https://forums.traxxas.com/showthrea...light=backyard


    Got out for some good long running of the TRX6 today.

    This truck is very impressive, it easily out-crawled my comp-setup TRX4. Here are a few take-aways...
    The body isn't as heavy as it looks. I was thinking I would be spending a lot of time on my lid, but rollovers were rare.
    The tires aren't bad, but there are better out there.
    The setup is pretty good out of the box, but some tuning is needed. Unlike the rest of the TRX family, I think portal weights are on option here, and not the rule, but I'll be installing them anyways.
    With the front locked and the back unlocked, the whole mess acts like a dig. A lot of times I was able to pull the front end around as if a dig was installed.
    I forgot to reprogram the ESC to Mode 5, but Mode 1 was as terrible as it is in the TRX4. In low gear with all of the diffs locked truck would creep down rocks in a very controllable fashion. Mode 5 would have been helpful in a good number of spots, and the double-clutch reverse of Mode 1 is annoying. No biggy though, next weekend it will all get ripped out and a Mamba-X and 2250kv motor installed.
    The steering servo has gots to go... I am REALLY surprised it still functions, and that I didn't fry it, or the XL5. I had it bound up hard quite a bit, it just doesn't have the guts to push the steering when crawling.
    This thing is FUN on 3S running on a dirt road! With the diffs unlocked you can whip the back end and getting into a reasonable drift. With the front locked it whips harder, and often gets spun out. With the back locked it usually just rolls over.
    I am still trying to figure out how to get a winch installed. Other then going through the body, I can't see any practical way to route the cable.
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  14. #14
    RC Qualifier USMC1984's Avatar
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    Quote Originally Posted by Greatscott View Post

    I don't think you are looking it the right spots for Rusty bodies. That is one of the more popular trucks out there.
    Please do tell me where! I've looked high and low...
    Last edited by USMC1984; 10-12-2019 at 09:56 PM.

  15. #15
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    Quote Originally Posted by Greatscott View Post
    Well, it is official, finally got my hands on a TRX6.

    I was going to wait for a kit version, but I got trigger happy. I figure now that I have bought the RTR, Traxxas will drop the kit in about two weeks, that's normally how my luck runs on these kinds of things... Oh, to be cursed with first-world problems...

    I just took it out of the box, and without any driving experience with it I can say that it is an impressive beast. I have never been a Mercedes fan, but this thing does look good. I really like that Traxxas did justice to this rig by all of the detailing it did on the body. The door handles and door bumpers are all parts and not stickers, the Mercedes emblem on the hood looks proper, and the lighting detail is superb.

    Untitled by Scott O, on Flickr

    As impressive as this rig is, there are a couple of initial annoyances with it. First, there is no place to rout a winch, which is standard equipment for all of my rigs. Second, I wish they would have made the mid-axle differently, allowing for the back axle to be exactly the same as the TRX4.

    Untitled by Scott O, on Flickr

    That is about all I can say about it until I get this beast on the rocks.
    My TRX6 arrived broken and bent. Traxxas shipped out a new one that arrives Tuesday, and they let me keep the old one. Most of the car is intact, just the chassis is terribly warped. I have too many spare parts though, probably going to use it on a kit.

  16. #16
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    As far as I know, the TRX4 Mercedes G500 4x4 (the same car but 4 wheels) (pretty much) has a tow hook thingie on the stock rear bumper, which I am 90% sure the tow joint can be mounted on. You can but the rear bumper of the G500 somewhere, and mount it on the TRX6.

  17. #17
    RC Turnbuckle Jr. Greatscott's Avatar
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    Good to know. As much as I want to dive in to it, I am taking the process slow, figuring out what I like about the truck as it is and what I don't.

    I know the the motor and ESC will be replaced, along with the RX. I am just trying to decide if I am going to run both diffs, or spool up the front and have the back diff on the servo. If I do run with just the back diffs lockable, I am thinking about flipping the front diff servo and linking it to the back diff servo, to give a bit of extra power. Or, I'll just go all out and put in a standard sized servo, might be a good spot for the 2075. But, the last thing I need is more of those tiny servos lying around, it seems like they have multiplied, I am not sure where they all came from.

    I do think I likely cooked my motor this morning. It suddenly started to run very slowly with a pack that was around 3.9vdc per cell. I put in a fresh pack and that briefly got it back up to speed, but when the pack fell below 4vdc/cell it slowed down again. Even though I am planning on replacing the ESC and motor, it is still annoying, it only has six packs through it, and I haven't ran it that hard. I already have the Mamba sitting on the bench, my LHS will get my 2200kv motor in this week, and by this weekend I will have the new system installed.

    Aside from just having fun, I was trying out my new phone tripod mount I designed and printed out. I have an iphone 8-plus with a case, it is REALLY hard to find phone holders that work, and post want to just pop the phone out,which makes me nervous, so I designed one that holds my phone securely... Right after this video the motor started acting up, so I didn't shoot any more on the TRX6.

    https://www.youtube.com/watch?v=Dww0macl4UI
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  18. #18
    RC Turnbuckle Jr. Greatscott's Avatar
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    Well... Good or bad, things is about to happen...

    Untitled by Scott O, on Flickr

    Still trying to figure out how to route the winch cable.
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  19. #19
    RC Turnbuckle Jr. Greatscott's Avatar
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    Winch Time...

    In is an absolute must to have a winch on my scale rigs, the TRX6 is no different... so here it is...

    It passed builds I used a 1/18 scale crawler transmission for a winch with great success, I would use this setup on every rig, but a lot of the time there is just not enough room to shoe-horn it under the body. So, I was happy as pigs in slop when I saw that I could get one under the body.

    The two tricky parts came in the routing, and getting the fairlead to work with the body. Luckily, there are people a lot smarter that I, and was shown a cool way to get it done.

    I will likely run this off of a HW1060 ESC, they are small, reliable, and have a drag brake. My only complaint is double-clutch reverse, but I put it on the winch-in side, so I don't accidentally pull the winch line in and bind the whole mess up.

    The big problem is I have reached the junction of where design meets the limits of PLA. I broke the first spool, I have made a few design changes to the new one, and printed it at 100% infill, but I am gun shy about putting a big load on it. I think I need to get some ABS filament and see if that makes it stronger.

    Going off of the stock plate, I drew up the winch base plate in Fusion 360. I already had the spool drawn up. After a tweak or two I got the dimensions correct and off the the printer.

    Aside from what is printed and the transmission/motor, I am also using a 5mm (5mm ID, 14mm OD) shoulder washer washer, and a 5x10mm screw. To act as a set screw I am using a 3x10mm screw thread screw. The transmission is bolted on with (4) 2mm

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    I carefully punched a whole in the body for the fair lead, and used a bent rod end to route the winch line.

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    And here is the whole mess together...

    Untitled by Scott O, on Flickr
    Last edited by Greatscott; 10-21-2019 at 10:29 PM.
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  20. #20
    RC Turnbuckle Jr. Greatscott's Avatar
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    Fixed the spooling, now it is smoother and more in-line with the pull. This is a little unnatural for me, I deal with large real-winders at work, and the material is always ran over the top.

    Untitled by Scott O, on Flickr
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  21. #21
    RC Qualifier USMC1984's Avatar
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    Pretty neat setup you got there! Kudos!

  22. #22
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by USMC1984 View Post
    Pretty neat setup you got there! Kudos!
    Thanks!

    I have new tires and wheels on order for this guy, its the same tires and wheels I am running on my TRX4.

    https://forums.traxxas.com/showthrea...t-s-TRX4/page4

    I had a thought of putting a spare tire on the back, but I don't know if I like the look of it. I designed a spare tire carrier and printed it out, it works exactly like I want it to, but I don't know if I like the look of it on the truck. If I were planning for this to by a competition rig, there would be no way I would mount it up high.

    Thoughts?

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr
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  23. #23
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    Quote Originally Posted by Greatscott View Post
    Thanks!

    I have new tires and wheels on order for this guy, its the same tires and wheels I am running on my TRX4.

    https://forums.traxxas.com/showthrea...t-s-TRX4/page4

    I had a thought of putting a spare tire on the back, but I don't know if I like the look of it. I designed a spare tire carrier and printed it out, it works exactly like I want it to, but I don't know if I like the look of it on the truck. If I were planning for this to by a competition rig, there would be no way I would mount it up high.

    Thoughts?

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr



    Cool stuff Scott. Couple questions:

    1. What 3d printer do you use?
    2. Did you create the entire winch or can that be purchased?
    3. Do you have another spare tire carrier you would like to part with?

  24. #24
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by remotekontrol View Post
    Cool stuff Scott. Couple questions:

    1. What 3d printer do you use?
    2. Did you create the entire winch or can that be purchased?
    3. Do you have another spare tire carrier you would like to part with?
    1. I have a Creality CR10. I am looking at getting another one, the CR10 is big, and overkill for a lot of the things I make. Plus, I really want the ability to print two things at once. Most likely it will be the Prusa Mini.

    2. The transmission is off of an 1/18 crawler (Losi Mini/Slick Rock). The baseplate and spool are my design.

    3. I do not have another carrier right now. I just printed it, so I needed to see how it was going to work out and if there were any tweaks that needed to be made. As it sits, it is how I want it, and will likely print a couple more out here in the next week or so.

    Here are the files for the winch and tire carrier...

    Winch:
    https://www.thingiverse.com/thing:3930409

    Tire Carrier:
    https://www.thingiverse.com/thing:3938773
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  25. #25
    RC Turnbuckle Jr. Greatscott's Avatar
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    Its fun, but it is a little nerve-racking when you remove all (or most) of the RTR electronics out of a rig. The only thing I am keeping are two of the mini servos.

    Untitled by Scott O, on Flickr

    I have changed up the design for the winch, I added a mount for the HW1060. The latest design is on the left.

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr
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  26. #26
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    Quote Originally Posted by Greatscott View Post
    Its fun, but it is a little nerve-racking when you remove all (or most) of the RTR electronics out of a rig. The only thing I am keeping are two of the mini servos.

    Untitled by Scott O, on Flickr

    I have changed up the design for the winch, I added a mount for the HW1060. The latest design is on the left.

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr
    That is so cool! Very nice work. How does the winch work? I mean, is it actually functional? It sure looks to be...


    Sent from my iPhone using Tapatalk

  27. #27
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by RC Dad View Post
    That is so cool! Very nice work. How does the winch work? I mean, is it actually functional? It sure looks to be...
    Sent from my iPhone using Tapatalk
    Many thanks!!!

    Yes, the winch is functional. It is basically a 1/18 scale crawler transmission. It is ran off of a HW1060 ESC that is connected to an aux channel (Spektrum DX5R). It is set up so that moving one of the toggle switches brings it in, or out.

    So, I have replaced all of the electronics except two of the mini servos for the transmission and back diffs, the front diff will be locked. The wiring isn't 100% tidied up, I am keeping the ESC RX plug easily accessible so I can make adjustments to ESC, if needed. I will likely drop my D-Link in so I can make adjustments while testing.

    Untitled by Scott O, on Flickr

    I do not like the wiring on the Mamba-X, it looks messy and there really isn't much I can do about it.

    Untitled by Scott O, on Flickr

    I might need to relocate the ESC for the winch, I am seeing a little bit of glitching on the Savox servo and it might be because of how close the winch ESC is to the servo.

    Untitled by Scott O, on Flickr

    In the testing I have done, I have found the forward diff being marginally useful being able to be locked and unlocked. To make my radio setup a little easier, I am going to spool up the front diff and leave the back unlockable. I found it very useful to be able to unlock and lock the back diffs. Until I get the spool for the front, I have locked the front locker with some fuel tubing and a couple of zip-ties.

    Untitled by Scott O, on Flickr

    Right now I am waiting on the wheels and tires I ordered. I ordered an extra set to give the TRX4 and TRX6 spare tires. I designed and printed out some spare tire mounts. My original design is on the left, and will work in most places you'd want to mount a spare. But I was thinking of mounting the spare on the tail gate, but the bolt placement on the original design will hit the chassis, so I designed two more to correct for this issue. Most likely I will go with the one in the middle if I do mount the spare on the tailgate.

    Untitled by Scott O, on Flickr
    Last edited by Greatscott; 10-30-2019 at 09:40 PM.
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  28. #28
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    Quote Originally Posted by Greatscott View Post
    Many thanks!!!

    Yes, the winch is functional. It is basically a 1/18 scale crawler transmission. It is ran off of a HW1060 ESC that is connected to an aux channel (Spektrum DX5R). It is set up so that moving one of the toggle switches brings it in, or out.

    So, I have replaced all of the electronics except two of the mini servos for the transmission and back diffs, the front diff will be locked. The wiring isn't 100% tidied up, I am keeping the ESC RX plug easily accessible so I can make adjustments to ESC, if needed. I will likely drop my D-Link in so I can make adjustments while testing.

    Untitled by Scott O, on Flickr

    I do not like the wiring on the Mamba-X, it looks messy and there really isn't much I can do about it.

    Untitled by Scott O, on Flickr

    I might need to relocate the ESC for the winch, I am seeing a little bit of glitching on the Savox servo and it might be because of how close the winch ESC is to the servo.

    Untitled by Scott O, on Flickr

    In the testing I have done, I have found the forward diff being marginally useful being able to be locked and unlocked. To make my radio setup a little easier, I am going to spool up the front diff and leave the back unlockable. I found it very useful to be able to unlock and lock the back diffs. Until I get the spool for the front, I have locked the front locker with some fuel tubing and a couple of zip-ties.

    Untitled by Scott O, on Flickr

    Right now I am waiting on the wheels and tires I ordered. I ordered an extra set to give the TRX4 and TRX6 spare tires. I designed and printed out some spare tire mounts. My original design is on the left, and will work in most places you'd want to mount a spare. But I was thinking of mounting the spare on the tail gate, but the bolt placement on the original design will hit the chassis, so I designed two more to correct for this issue. Most likely I will go with the one in the middle if I do mount the spare on the tailgate.

    Untitled by Scott O, on Flickr
    All I can say is WOW! Truly inspiring. Just curious, how did you learn to design 3D parts?


    Sent from my iPhone using Tapatalk

  29. #29
    RC Turnbuckle Jr. Greatscott's Avatar
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    Quote Originally Posted by RC Dad View Post
    All I can say is WOW! Truly inspiring. Just curious, how did you learn to design 3D parts?


    Sent from my iPhone using Tapatalk

    Thanks!!!

    The long and short of it, I found popular free CAD software, and then took a week off from work and learned it via YouTube.

    My weapon of choice here is Fusion 360, it is as easy to learn as any CAD software, lots of popular 3D printing and design channels on YouTube use it, and it is free for hobbyist.

    There are two channels I mainly watched to learn the software, I have a wide monitor, so about 2/3's of my screen had Fusion on it, and the other 1/3 was the video. The videos go step by step, and tell you why they are doing it that way.

    https://www.youtube.com/channel/UCoo...DaWk_eqxIXXiOQ

    https://www.youtube.com/watch?v=B0GwSiaBUJE

    Word of warning through, Fusion 360 changed their design interface about two months ago, and the tutorials have not been brought up to date, so it might be a little confusion. But, if you poke around a bit you'll see all of the controls are there, just in a different place, or might have slightly different names.

    Also, if you search 3D printing channels, a lot of them go through their design process in Fusion, these are also wonderful learning tools.

    With that, there are a good number of things I still need to learn. Two things that are on my short list is how to build an assembly, and test it. Right now I am just building single parts, and there has been a good amount of trial and error for getting parts that go together to work properly. If I knew how to drawl assemblies, I could test the parts for functionality and clearances before sending them to the printer.

    The next thing to learn is how to bring in existing parts. If you design something once, and is something that you can use again, there is no reason to redraw it. I know you can do this in Fusion, I just need to learn how.

    An example of assemblies gone wrong, I had to print out the ramps for my trailer five or six times before I got them to work correctly. If I had drawn them as an assembly instead of two separate files, I would have only needed to print them once...

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    The trailer itself is a home built, made out of steel. I didn't fabricate it, I bought it used with just the axles attached. I found the wheel wells, tool box, tire chocks and chock brackets on Thingivse. The toolbox and wells I sized up in my slicer (Simplify 3D) to make them work. The jack and the ramps I designed.

    I like the toolbox, but the wheel wheels need to be redesigned. They were designed for another trailer, and I had to drill them it make them work. Plus, they wells are really thin, and will break easily. When I get some things cleared off my bench, I will revisit the wheel wells, making them thicker, and with proper holders for the tail lights.
    Submarine Qualified, Chief Inducted, Navy Retired

  30. #30
    RC Racer RC Dad's Avatar
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    Quote Originally Posted by Greatscott View Post
    Thanks!!!

    The long and short of it, I found popular free CAD software, and then took a week off from work and learned it via YouTube.

    My weapon of choice here is Fusion 360, it is as easy to learn as any CAD software, lots of popular 3D printing and design channels on YouTube use it, and it is free for hobbyist.

    There are two channels I mainly watched to learn the software, I have a wide monitor, so about 2/3's of my screen had Fusion on it, and the other 1/3 was the video. The videos go step by step, and tell you why they are doing it that way.

    https://www.youtube.com/channel/UCoo...DaWk_eqxIXXiOQ

    https://www.youtube.com/watch?v=B0GwSiaBUJE

    Word of warning through, Fusion 360 changed their design interface about two months ago, and the tutorials have not been brought up to date, so it might be a little confusion. But, if you poke around a bit you'll see all of the controls are there, just in a different place, or might have slightly different names.

    Also, if you search 3D printing channels, a lot of them go through their design process in Fusion, these are also wonderful learning tools.

    With that, there are a good number of things I still need to learn. Two things that are on my short list is how to build an assembly, and test it. Right now I am just building single parts, and there has been a good amount of trial and error for getting parts that go together to work properly. If I knew how to drawl assemblies, I could test the parts for functionality and clearances before sending them to the printer.

    The next thing to learn is how to bring in existing parts. If you design something once, and is something that you can use again, there is no reason to redraw it. I know you can do this in Fusion, I just need to learn how.

    An example of assemblies gone wrong, I had to print out the ramps for my trailer five or six times before I got them to work correctly. If I had drawn them as an assembly instead of two separate files, I would have only needed to print them once...

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    Untitled by Scott O, on Flickr

    The trailer itself is a home built, made out of steel. I didn't fabricate it, I bought it used with just the axles attached. I found the wheel wells, tool box, tire chocks and chock brackets on Thingivse. The toolbox and wells I sized up in my slicer (Simplify 3D) to make them work. The jack and the ramps I designed.

    I like the toolbox, but the wheel wheels need to be redesigned. They were designed for another trailer, and I had to drill them it make them work. Plus, they wells are really thin, and will break easily. When I get some things cleared off my bench, I will revisit the wheel wells, making them thicker, and with proper holders for the tail lights.
    Id love to take a week off from work to tinker with the RCs! Having two wild boys (4 and 1.5 yrs) doesnt leave time for much else. I also work as an arborist in Boston, and life is just too busy. My wife and I often laugh about how theres not even time to just have a simple adult conversation.

    Id love to learn more about 3D design and printing though, so thanks for the links! Im sure Ill watch the videos after I read the 6 or so books that Ive bought and not read this year

    Again, thanks for sharing! I look forward to seeing more pics and vids of your TRX in action.

    Is the TRX-6 a more capable climber than the TRX-4 Sport, in your opinion?

    Thank you!


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  31. #31
    RC Turnbuckle Jr. Greatscott's Avatar
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    Well, there is a reason I have over ten weeks of vacation on the books, I normally do not get much time to take it either. But, I had one of those rare occasions come up where there wasn't much to do for my main projects, and my side projects were not pressing, so I took the week. To be fair, I also did a ton of yard and house work as well in that week.

    Yes, the TRX6 crawls better out of the box than the TRX4, and this is due to a number of things..
    • It is just heavier and more well planted than the TRX4.
    • Even though the body is very detailed, it is a lot lighter than most of the other TRX bodies out there.
    • Six is better than four for traction. Even with the back axles unlocked, the truck crawls like a goat. Sometime I forget to lock the back, and don't notice it until a diff unloads.
    • It naturally goes up and down steep grades better, that back axle adds a lot of stability.
    Submarine Qualified, Chief Inducted, Navy Retired

  32. #32
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    Well, I think about to put a fork in this thing and call it done... for now.

    Now its all about getting it out on the trails and rocks to get it tuned up. The B-Link is installed, so I can make adjustments easily. Everything looks like it is running pretty good, but the ESC is a little sensitive in the reverse direction, so I'll likely adjust the throttle curve a little bit.

    Untitled by Scott O, on Flickr

    Pretty much the only thing left, aside from tuning are the wheels and tires. The tires came in today, but my wheels are likely another week or two out.

    One BIG criticism about the TRX4/6 design, the front axle and the servo are perfectly in alignment to make tightening the servo horn screw a bear. Normally I mount the servo, zero the pots and end points, power up the servo, get the horn on as centered as I can, turn it off, tighten the horn, then turn it on and fine tune. With the TRX4/6, you have to center up the horn before the servo is installed. Luckily (and it might be by good design), tightening up the servo horn before I installed the servo worked out.
    Submarine Qualified, Chief Inducted, Navy Retired

  33. #33
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    Had this guy out today for some hard-core testing of the electronics. Overall, I am please with how everything worked.

    • The low-speed control is what I expect from a Mamba-X and a decent sensored motor. Low speed control is was excellent in high and low range. I am a little disappointed with the top end speed on 3S, it isn't bad, but I was expecting more. I am running a HW 2500kv motor, and I was expecting a bit more speed than my TRX4 which is running a Castle 1900kv motor with the same gearing.

    • I need to move the back diff lock to another control on my DX5R. Right now I have it on the button on the bottom of the steering wheel. This works, but it is annoy not being able to tell if the diffs are locked or not. I thought about setting up an LED that would come on when the diffs are locked, but I don't want to make the electronics any more complicated. Moving the control up to the switch next to the slider will solve this issue.

    • The body took more damage than I really wanted it to. It is important to keep the body tucked into the sides, if it comes out the body will hang up and rip. I also have one of the LEDs on the hood that need to be fixed.
    Submarine Qualified, Chief Inducted, Navy Retired

  34. #34
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    Lol, my TRX6 is my shelf queen, I literally polish it after every run. I prevent scratches at all costs

    On the other hand, though, My TRX4 with half cab is my demolition derby equivalent car, the body has about 1000 scratches on it.
    Jumping: maneuver and pray it won't break.

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