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04-03-2017, 05:35 PM | #1 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Building the "ALtra" Ultra RR10 Bomber
Last year at Axialfest '16 the "Ultra" class was ran a bit differently than past years. Instead of running out on the usual trails with the "Adventure" drivers, last year the Ultra class had it's own dedicated trail and event. Ultra drivers would run 1 trail with multiple laps covering the distance of a normal 5k marathon, hence the partnership with "Altra" running. The new format also spawned a race series "Scale Ultra" with the final race of the series being Axialfest 2017 (more info on Altra can be found here www.altrarunning.com) This format would allow the Ultra drivers to have their race without navigating "Adventure" traffic, and Adventure drivers weren't getting run over by the faster "Ultra" drivers and rigs. Once the "Altra" Ultra event was finished the Ultra drivers could then grab their "Adventure" rigs and join their friends and family out on the normal Adventure trails for some slower paced fun. With the creation of the new "Scale Ultra" series I have decided to build a rig dedicated to the series and this type of competition. This rig will likely see many changes and upgrades as I figure out what is needed to build a competitive vehicle for this type of driving. Along the way I plan to document the changes and upgrades along with the cost of the rig and upgrades. I will also try document runs on the vehicle, such as events, and practice runs, etc. IMO the obvious choice of this type of competition is none other than the Axial RR10 Bomber. I believe this platform is the perfect balance of speed for the fast more level sections of the course along with having the crawlability to navigate the more technical sections of the course. I'm going to start with an RR10 Bomber kit. The included upgrade parts in the "Kit" version are essential to building a rig reliable enough to survive a 5k endurance race. I will be adding some additional upgrades to further expand the reliability, durability, and performance before the rigs first event, which just so happens to be this Saturday (4/8/17) at Sand Hollow in St George. All the specs will be posted in this first post Anyway I hope some of you follow along and lets see where this build takes us. $360 - Vehicle: Axial RR10 Bomber "kit" $215 - Tekin RX4 $150 - Tekin Pro4 HD 3500kv $240 - Futaba BLS177HV Upgrade list w/ pricing $38 - VP Incision Spools x2 $35 - BeefTubes Brass front $35 - BeefTubes Alum rear $57 - Axial Alum Mtr Plate $17 - Axial Alum Slipper plates $14 - VP Alum Servo horn $50 - Axial Alum C-hubs $43 - Axial Alum Knuckles $120 - VP Method 105 Wheels x2 $30 - VP 475 hubs x2 $30 - CI Dual Stage Foams x2 $7 - Wraith Link Mounts (front, inverted) $110 - Proline ProSpec Shocks (front & rear) $10 - Axial Radiator $53 - Axial Icon Shocks (secondary bypass, none functional) Current Running Cost $1604 Events/Trails: Destination/Dificulty/Damage (I'll list distance and time when applicable) Scale Ultra Red Rock 5K: Medium, Rod end, 2.0miles, 35:24min Lil Moab Test Day: Hard, 2 Rod ends 801rcc Stateline 400: Medium, No Damage 1.1mile 32.19min Granite Flats Trail: Medium, No Damage, 2.2miles, 40min Lil Moab Test Day: Hard, 1 Rod end 801rcc SRS Grand Prix: Medium, No damage, .9miles, 25.57min Here is where we are at so far I know its not much so far, but we'll be adding more goodies later this week. Last edited by NaZ-T; 06-12-2017 at 03:04 PM. |
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04-04-2017, 12:04 AM | #2 |
RCC Addict Join Date: Jul 2009 Location: Ontherocks
Posts: 1,980
| Re: Building the "ALtra" Ultra RR10 Bomber
Very nice! I caught the Altra 5K bug at KOH this year and have since redone my bomber to be legal. Mr. Rivas Concepts himself said it was designed to be a RR10 Bomber spec class, so you've made a good choice.
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04-04-2017, 07:42 AM | #3 |
Rock Crawler Join Date: Mar 2016 Location: HB
Posts: 946
| Re: Building the "ALtra" Ultra RR10 Bomber
This will be an interesting thread to follow. Look forward to your progress
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04-04-2017, 10:05 AM | #4 |
Rock Stacker Join Date: May 2010 Location: SLC, UT
Posts: 50
| Re: Building the "ALtra" Ultra RR10 Bomber
Nice! What tire are you going to start with? A Pro-Line tire or try the BFG's for a while?
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04-04-2017, 06:08 PM | #5 |
RCC Addict Join Date: Feb 2008 Location: Crawlerado
Posts: 1,411
| Re: Building the "ALtra" Ultra RR10 Bomber
You've got a lot of work to do before Saturday... |
04-05-2017, 12:18 PM | #6 | |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber Quote:
Yeah tell me about it. Last edited by NaZ-T; 04-05-2017 at 12:57 PM. | |
04-05-2017, 12:31 PM | #7 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber
First round of Upgrades came in yesterday. Looks like I've got wrenching to do. First items to get thrown it are Incision Spools from Vanquish. Although the stock locker would hold up very well with stock or mild power systems, with the power system I have planned for this rig, I don't think it would last very long. So we'll get this taken care of early on in the build. Last edited by NaZ-T; 04-05-2017 at 01:01 PM. |
04-05-2017, 12:41 PM | #8 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber
Still working with the axle internals, next up are BeefTubes!! I opted for the Brass up front and Alum for the rear. The brass will add a little bit of weight to the front to help gain grip for the more technical sections of the course, and help prevent me from damaging the axle housing in case I'm "over driving" the car (which I've been known to do occasionally) While the alum in the rear will give me the strength with minimal added weight to the back. I do plan to run the spare tire which will help balance the car out and help with rear traction along with keeping the rear of the vehicle planted. Last edited by NaZ-T; 04-05-2017 at 01:05 PM. |
04-05-2017, 02:13 PM | #9 |
Quarry Creeper Join Date: Oct 2016 Location: Hanover
Posts: 304
| Re: Building the "ALtra" Ultra RR10 Bomber
Nice man! I like your background setup. Makes it look real scale. Very cool!!
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04-06-2017, 06:27 PM | #10 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber |
04-07-2017, 11:06 AM | #11 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber
More goodies for the rig!! Lets get some rubber underneath this thing. So for grip I'm going go with the Axial BFG Baja T/A. I've ran these in the past and the grip out of these is phenomenal. To help firm up the tires and keep them from rolling in the corners at speed, I filled them with Crawler Innovations 5.5 foams. No skimping out in the wheel department. This rig is getting the best you can buy, Vanquish Products Method 105's. These are my favorite wheel on the market. I love the look of these wheels and they hold a bead fantastic along with being one of the easiest sets of wheels to mount. The VP wheels will also allow me to adjust the width of the rig. I'm going to start with the 475 hubs, then adjust if necessary. |
04-07-2017, 03:53 PM | #12 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber
now for the expensive parts..... Electronics I'm going for Tekin for the power system so I picked up one of their new RX4 ESC's and I'm matching it with the Pro4HD 3500kv (I know the motor is a bit over the specs for the RX4, but I'm going to try it anyway) The servo takes more abuse than any other component on the car so I spared no expense and picked up the Futaba BLS177HV..... Ouch!! I also made a little mount for the ESC out of some carbon fiber I had laying around. |
04-07-2017, 11:13 PM | #13 |
I wanna be Dave Join Date: Sep 2005 Location: *
Posts: 2,877
| Re: Building the "ALtra" Ultra RR10 Bomber
Glad I found your thread T$... Always so fresh and so clean Sent from my iPhone using Tapatalk |
04-09-2017, 08:52 AM | #14 |
Moderator Join Date: Sep 2008 Location: PA
Posts: 13,935
| Re: Building the "ALtra" Ultra RR10 Bomber
Very clean looking Bomber so far. I like it. The carbon fiber plate is very nice. It's all in the details. And your garage is cool too. The stock tires will hold you back IMO. Axial needs a new rubber compound. |
04-11-2017, 01:59 PM | #15 | |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber Quote:
The smaller tire diameter was noticeable over the weekend (as my other rig is on Proline Hyraxs) but after the first lap I just knew to hit the obstacles with a bit more momentum. It wasn't detrimental but noticeable. I will likely switch to a larger tire in the near future. | |
04-11-2017, 02:03 PM | #16 | |
Moderator Join Date: Sep 2008 Location: PA
Posts: 13,935
| Re: Building the "ALtra" Ultra RR10 Bomber Quote:
I don't mind the size of the Axial tires. I think tire sizes are getting out of hand. A Bomber is not supposed to be monster truck. And if you make the tires too large it takes away some of the challenge. | |
04-11-2017, 05:17 PM | #17 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber |
04-11-2017, 05:48 PM | #18 |
Moderator Join Date: Sep 2008 Location: PA
Posts: 13,935
| Re: Building the "ALtra" Ultra RR10 Bomber |
04-11-2017, 07:00 PM | #19 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber
Scale Ultra "Red Rock 5k" Race Report So I was able to get the rig up and running just hours before the event. The rig ran very well for being just factory setup. I was able to run the full race without any issues or failures. The only thing holding me back was,..... Myself. I need to be in better physical shape to be more competitive for this type of event. My pace was very fast during the first half of the race but I wasn't able to maintain that speed. So as the race went on my pace slowed, eventually dropping me into a 5th place finish. I'm very happy with my finish but would definitely like to be faster. After the event we spent the afternoon testing the new rig, focusing mostly on suspension. At the end of the day I did have a rodend failure. I was running the car extremely hard and had a ton of big air jumps. I was planning on doing the budget fix and just replace the rodend, but with rodends being on backorder I'll likely have to "upgrade" to aftermarket links. Things I noticed and will possibly change or address: Front shocks: The front shocks felt a bit on the heavy side. While landing jumps or hitting bumps at speed the front would buck. I would like to have a bit more dampening from the shock and possibly a lighter spring to help soak up the bumps and jumps. Tires: I did notice the rig dragging a bit on the rocks. The Axial BFGs are a bit smaller than the tires on my old rig. I don't know that I'll change these, it was just something that was noticeable compared to me other Bomber ESC: The Tekin RX4 performed fine with out any issues and ran perfect for the race with the setup I had programmed into it. But once we slowed down and were just playing I found I wanted to have more drag brake. Of course you can adjust this with the Hot Wire but it would be nice to make this adjustment on the fly. |
04-11-2017, 07:06 PM | #20 |
RCC Addict Join Date: Dec 2004 Location: Behind the wheel of an Axial R/C
Posts: 1,921
| Re: Building the "ALtra" Ultra RR10 Bomber |
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