The unofficial official axial portal buggy.

[Brake Weight]

Well. I put mine together except for the electronics. Overall very pleased with the build aside from the hardware. 1 bolt in particular. I’ll try to get some electronics in it tomorrow and will look at snipping the hood shorter.

The hex rounded out and was nearly in. You must keep a level driver all the way or this happens.

 

[Brake Weight]

I know I’m not the only one that noticed the potential to add a bearing to both sides of the rear axle. Dig me out a pair and they were perfect until I tried to put the portal cover on. The recess is a mere 1mm too shallow to add a bearing. It doesn’t really need one, but it’d been nice to be able to put one there.

I also left the bearing out of the back of the tranny. Spooled it up on my cordless drill and figured out that quickly. There’s a lot to disassemble to get that bearing in.

Then the shocks.... I thought it can’t be that bad.... They are done but I’ll use some different shock oil that I have.

 

[durok]

BTW - as a general FYI... it looks like JRH isn't recommending the Mamba Micro X for the Capra even tho' it hits the weight mark - because of the 30:1 gearing.

Taken from his recent Revolver YouTube video, he commented that "Since the Capra has 33% less reduction than I would normally run, it requires 33% more amperage for the same torque at the wheel. That makes for about 76% more heat in the controller."

Since the main issue with the Mamba Micro X is that it can't dissipate heat as well, he's recommending the SideWinder4 (with the Revolver) or the Mamba X (with whatever).

I'm posting this because I had mentioned a couple times that I thought the perfect ESC/motor combo for the Capra would include the Mamba Micro X - and I'd like to correct that.

(think I'll try to find my posts where I did that and add an edit to be safe) "thumbsup"

OK - I'm adding this info below to all the posts where I said the Micro X would be a good choice for the Capra:

EDIT: Regarding the Mamba Micro X being considered for use in the Capra - please see the linked post below - no longer recommended because of the overall gearing of the vehicle - Apologies!:

http://www.rccrawler.com/forum/axial-capra/610624-unofficial-official-axial-portal-buggy-45.html#post5967932

 

[punkindrublik]

BTW - as a general FYI... it looks like JRH isn't recommending the Mamba Micro X for the Capra even tho' it hits the weight mark - because of the 30:1 gearing.

Taken from his recent Revolver YouTube video, he commented that "Since the Capra has 33% less reduction than I would normally run, it requires 33% more amperage for the same torque at the wheel. That makes for about 76% more heat in the controller."

Since the main issue with the Mamba Micro X is that it can't dissipate heat as well, he's recommending the SideWinder4 (with the Revolver) or the Mamba X (with whatever).

I'm posting this because I had mentioned a couple times that I thought the perfect ESC/motor combo for the Capra would include the Mamba Micro X - and I'd like to correct that.

(think I'll try to find my posts where I did that and add an edit to be safe) "thumbsup"

OK - I'm adding this info below to all the posts where I said the Micro X would be a good choice for the Capra:

EDIT: Regarding the Mamba Micro X being considered for use in the Capra - please see the linked post below - no longer recommended because of the overall gearing of the vehicle - Apologies!:

http://www.rccrawler.com/forum/axial-capra/610624-unofficial-official-axial-portal-buggy-45.html#post5967932

Too late. I'm committed, lol. I went with a 2200kv Puller Stubby, so hopefully I'll be ok.

 

[Sneetches]

I've got about 3 hours of runtime on my Holmes 2700kv stubby w/ Mamba Micro X, with a 12t pinion. Checked multiple times while running and it doesn't get much warmer than 90-100°F.

 

[RMIII]

Has anyone tried one of the HH devolver motors? Supposedly run hotter than a revolver but other than that??? I bought one to try but was wondering if anyone else already has.

Sent from my Pixel 2 using Tapatalk

 

[durok]

Too late. I'm committed, lol. I went with a 2200kv Puller Stubby, so hopefully I'll be ok.

Well - heck...

Guess it'll be OK, per the next post...

I've got about 3 hours of runtime on my Holmes 2700kv stubby w/ Mamba Micro X, with a 12t pinion. Checked multiple times while running and it doesn't get much warmer than 90-100°F.

I suppose it may be partly in how the combo is driven? "thumbsup"

Has anyone tried one of the HH devolver motors? Supposedly run hotter than a revolver but other than that??? I bought one to try but was wondering if anyone else already has.

Sent from my Pixel 2 using Tapatalk

I have a Standard Revolver v1 - the Devolver and Micro X combo is what someone reported having issues with in the Capra - supposedly toasting the ESC... :shock:

 

[youngblood]

The LHS actually had one of these on the shelf. I was expecting a box the size that the old Wraith kits came in ( being a tube chassis type vehicle ). I haven't purchased a new RC since the Dingo was out, this might change very soon. :mrgreen:

I built mine into a roller over the weekend. Scoop one up, its an awesome kit!

 

[RMIII]

I have a Standard Revolver v1 - the Devolver and Micro X combo is what someone reported having issues with in the Capra - supposedly toasting the ESC... :shock:

Hopefully a Mamba X will be ok. I've heard the micro has a hard time staying cool anyway since it has no fan and isn't really designed for these rigs?

Sent from my Pixel 2 using Tapatalk

 

[mewalsh100]

By all accounts, this is one of the most well received Axial rigs in quite sometime. It got me to thinking..............I wonder if Traxxas is going to respond with something in this format?

 

[Robbob]

The LHS actually had one of these on the shelf. I was expecting a box the size that the old Wraith kits came in ( being a tube chassis type vehicle ). I haven't purchased a new RC since the Dingo was out, this might change very soon. :mrgreen:

I built mine into a roller over the weekend. Scoop one up, its an awesome kit!

Grabbed one friday night from my LHS and had my daughter build it (minus the cage part). Everything from packaging to a roller was super easy and very impressive. "thumbsup"

 

[RMIII]

So I went down to my nearest LHS, an hour away, not bothering to call first (my fault I guess) and found out they don't stock anything Axial... So I asked if they had an Enduro. Nope, Strike 2! I saw some rc construction equipment and thought about Christmas for my boy... No crane, Strike 3! Probably won't be heading back there anytime soon. Ordered my Capra from the parking lot, it'll be here Thursday!

Sent from my Pixel 2 using Tapatalk

 

[JatoTheRipper]

The updated manual is up on Horizon's site.

The spur gear shaft step has been corrected, but the subsequent steps still show the flange for the spur gear on the inside of the transmission which is wrong. Not sure they they didn't correct that as well. I didn't look over any of the other steps.

The driveshafts are still also shown out of phase in the manual - no?

https://www.horizonhobby.com/pdf/AXI03004-Manual-MULTI.pdf

 

[MrFridayNight]

The driveshafts are still also shown out of phase in the manual - no?

https://www.horizonhobby.com/pdf/AXI03004-Manual-MULTI.pdf

Yes, the driveshafts appear to be out of phase at the bottom of page 25.

 

[Rich Trujillo]

The updated manual is up on Horizon's site.

The spur gear shaft step has been corrected, but the subsequent steps still show the flange for the spur gear on the inside of the transmission which is wrong. Not sure they they didn't correct that as well. I didn't look over any of the other steps.

The driveshafts are still also shown out of phase in the manual - no?

https://www.horizonhobby.com/pdf/AXI03004-Manual-MULTI.pdf

LOL...I never noticed that...too late now but assuming you follow the directions in a previous step should be ok for now.

As for out of phase, I think the manual designer did that to show the pin going in not realizing the way its supposed too go. Good catch.

These edits will have to be made at a later printing.

Rich

 

[BigSki]

I built mine into a roller over the weekend. Scoop one up, its an awesome kit!

"thumbsup" I know that it could be a fun rig at a Bob Rocks event. Are you going to the VA scale comp this upcoming weekend?

 

[mett1971]

I read others saying trans was loud. Mine was too. Didnt sound right. Took back out and realized when I was tightening motor it crept in and tightened gear Mesh. So I reset mesh and now its very quiet.

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[TheLetterJ]

I'm not 100% done building my Capra yet, but I was able to give it a little shakedown before I stick down the receiver and tidy/secure all the wiring, and while I wait on my last few parts (receiver and narrower hubs.) I'll probably get the paint done in the next day or 2.

I shaved the steering stops and the back side of the portal boxes to the point that I could barely detect some wobble from the universals. Threw 2 minor bends in the tierod to clear the pumpkin at full lock, and adjusted it slightly toe out so that both wheels hit lock at the same time. Ended up at 55° without even clearancing the u-joints. Lengthened the front lower links 2 full turns to give a little more caster to help it bite in turns. Those changes along with the overdrive gears in the front has it turning sharper than most without even using the dig. Not too shabby. I'm predicting my first part failure is going to be the servo mount, either peeling it off the axle housing, or simply breaking the ears off. It moves quite a bit with the A700 pushing/pulling on it.

Found an aluminum horn in my spare parts to fit the sx107 dig servo and got my endpoints set up for 2 positions.

With the smallest pinion that fits with good mesh (11t) this thing is quite a bit faster than necessary with a 2700kv on 3s. No complaints from me on startup though, and the stubby motor and Mamba Micro X did not complain either.

After my test drive, I'm questioning my choice of 4.5" soft foams in my 4.75" tires, wishing I'd gone with my original plan of 4.75" soft front/medium rear. Using the dig tends to roll the outer foam towards the inside of the car. I ordered another set of 225 hubs which will get total width down to 10.75" which is right where I was hoping to land.

I played around with more shock preload on the soft springs and saw some improvement, so I'll likely throw the medium springs in at least the rear. I was also dragging belly more than I like, so I may either run shorter spacers in the shocks (currently 6mm front, 3mm rear) or take them out altogether since it doesn't drive as top heavy as it looks.

Even with 2.75oz in each front wheel (for now) this car needs more weight up front, I'm hoping the aftermarket will come out with heavy knuckles and portal covers soon! Rtr weight with a 2200mah 3s is at 5.7lbs right now, a lighter battery and titanium upper links are on the list.

I can definitely see this car's potential, but right now, my dialed in Wraith is still the better crawler. I'm sure that will quickly change as the Capra gets dialed in.

 

[RCTom]

With the smallest pinion that fits with good mesh (11t) this thing is quite a bit faster than necessary with a 2700kv on 3s. No complaints from me on startup though, and the stubby motor and Mamba Micro X did not complain either.

What make/model is that 11T pinion you're using? I'm having a hard time finding 48P pinion gears that small. I see on the RPP website they have some Robinson Racing extra hard and wide 11T pinions with an aluminum collar (https://www.rpphobby.com/product_p/rrp1411.htm) but I'm unsure if the extra wide will fit the Capra. Does anyone know, or have any other suggestions? Also, you're saying that 10T and less tooth pinions won't mesh right, huh?

BTW, I'm probably using the same motor in my Capra as you, an HH Puller Pro Stubby 2700 kv.

 

[Panther6834]

I would think the Robinson Racing 11T (RRP1411) & 12T (RRP1412) pinions would work. After I get my ESC & motor installed today, and do a test run, I just might order them, just to find out.

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