RRCZ Explores: Official Axial & 3rd Party RR10 Bomber Hop-Ups
Words & Images: Steve “Speedy” Allen
Donor Vehicle Manufacturer: Axial Racing
Donor Vehicle RTR RRP: $399.99
- Length: 570mm
- Width: 280mm
- Height: 230mm
- Wheelbase: 375mm
- Ground Clearance: 72mm
- Weight: 2.83kg
You’ve got yourself an Axial Bomber, do you want to take it to the next level? With some selective Hop-Ups you can make it into an awesome Rig – to do just about anything – be it rock racer or full on crawler.
I wanted the best of both worlds, a scale rig that can go fast but also crawls as well as can be. The RR10 which is part Wraith, part Yeti has the bonus of being good at both. With the optional two speed gear box you can get some good speed out of a brushed motor in the second gear and still be able to crawl in the first low range gear.
I have to admit here I haven’t driven a box stock RR10 Bomber because as soon as mine turned up it was stripped and prepped for hop ups! So I took the chance to go out with fellow contributor Scott ‘AceofAxe’ Curlin and got to see how well a box stocker handled and crawled.
The RR10 uses the AR60 axles the same as the Wraith and on the rear of the Yeti, these are great axles and stand up to a fair bit of abuse. The front has a new double shear knuckles which look very scale and should prove to be tough and durable.
Both the link and dampers have extra mounts for secondary dampers on the front and a Yeti sway bar on the rear. Unfortunately they don’t use nuts to retain them like on the wraith and yeti but rather just screw into the plastic. I’m not sure how long these will last to abuse but I’m sure Axial will be releasing some alloy options soon enough.
There is a bit of play between the ball stud for the link and damper so it’s wise to nip these up and remove the play. The grub screws that hold the links to the chassis can’t be tightened as the screw has no head. I think with a little modification a normal machine screw will be possibly used.
Overall I’m really impressed with what Axial have brought out. It looks really good and performs so much better than any stock Axial before it. Moving the battery under the bonnet was such a smart move, getting the weight up front is such a must and makes a huge difference. The easy access bonnet is also great. The battery compartment will handle 3s 4000mAh LiPos with the only issue being tucking the wire out of the way.
Where’s The Cheat Codes?
A total of eight screws hold the body to the chassis and four grub screws hold the dampers to the body. With no electrics mounted to the body it makes life easy to get in and work on the rig.
The first thing to be stripped of was the spare wheel mount. I think it looks great with the tyre on but for all out performance the weight is in the wrong place and it hangs out of the back and easily gets caught.
Tip: Replace the grub screws on the shocks with the normal domed head screws from the spare wheel to make life a little easier out on the trail if you need to fix it.
Next job was stripping the electrics out. The servo is held onto a new style mount with some nice large-head screws – usually only included with a few servos and not kits – there was even a spare one in the
bag of parts included.
Also in the bag of spares is the coolest part, Axial have made a through -drive for the AR60 axle so you can make a 6WD rig with an AR60 axle with ease. You’ll also find so many other cool bits in this bag that you hadn’t thought of, though I do miss all the scale guns you used to get!
I replaced the kit servo with a Savox SA1283SG. I chose this servo for its reasonable price and also its 30kg power at 6V. The reason I went for 6V is I’m thinking of adding a winch and the stock servo would be perfect to make a winch servo so it was safer to go for the lower voltage.
Servo power was to be supplied by a Castle Creations BEC which would be fitted in the radio box which looks the bottom of an engine, very cool feature! Also in the radio box goes a 6 channel Futaba receiver to work with my Futaba 4PL radio.
Next step on the electric upgrades were the motor and ESC. Up until now I have always been a brushed motor guy for crawlers and scale builders alike. But I knew the Bomber needed more power, greater speed and still be able to crawl. There was only one type of motor to go for: a four pole brushless motor. I’m not the best off – all hop ups were bought by me and not gifted, but I’m also currently restoring a 1970 Audi – so my budget had to be tight but it also had to be smart. With a little hunting online I found Toro had come out with an S-Pro4 four pole range of motors and I chose to go for a 3000kV model. This should give me plenty of wheel speed but still be good a low-end for crawling control.
To feed power to this I had a Castle Creations Mamba Max Pro in my old Wraith review car from years ago. The Wraith is getting all the Bombers electrics and become my wife’s new rig. The Mamba Max Pro needed the settings adjusted on the PC to make it more suitable for the Bomber and brushless power.
With the motor being swapped out I knew I wanted an alloy motor mount and after looking online I found that GPM made a nice black anodised item which comes with both the mounts to the transmission and to the motor.
Extra Life Given
The transmission is very similar to the Yeti’s one with the only difference being the transmission case. I’m not 100% on if the gears in the transfer case are the same as the angle it mounts to is different to the Yeti. It comes away from the skid plate with six screws and is soon apart with another six screws.
I gave the gears a good coating of Heavy duty bearing grease as there was very little to no grease on the gears. No upgrades were done on the internals gears or even to the spur gear. I did order an Axial alloy spur but when it turned up I went to fit it and the slipper pads appeared to be stuck to the plastic spur, so rather than risk damaging them with no spares on hand and not be able to run the rig. I did fit Some Axial alloy slipper plates, though I’m not sure if these are really needed.
I felt that the rear axle didn’t need too much improvement, so the only upgrades were Axial’s HD stock ratio gear and Hot Racing’s locker. I left the axle shafts standard and even the axle lock outs were kept.
The next upgrade were the rear links, I went for some Blue Monkey Yeti rear arms which use Traxxas rod ends which are a lot stronger. For the upper links I made some carbon rods and again used the Revo rod ends to keep it all nice and tough. This all bolted up nice and easy and the only play was the lower links to the skid plates, a shim could be easily fitted to take out this play.
I’ve been really impressed with the Axial WB8 drive shafts and so these were reused on both ends – all I did was put a nice bit of thread lock on the grub screws as there didn’t seem to be any on then and you don’t want them coming out!
Moving to the front axle a little more work was carried out – again Axial HD gears were used but this time I went for overdrive gears and Hot Racing lockers. Looking online most people who have upgraded their’s have gone for under drive on both or just rear but me and going slow just doesn’t happen.
The dog-bone driveshaft’s were not going to cut it, so in went some Axial Wraith universal driveshaft’s which increase steering and are just better overall.
Next are the knuckles and hubs, I’m not normally a bling brand name guy but after seeing Vanquish products knuckles and clamping hubs I just had to have some, though I didn’t want them to stand out too much so I went for black.
Steering links I went for some titanium items again from Vanquish, although I did order the wrong one but with a little extra bending and some longer Traxxas rod ends it was soon fitted and in a stealthy way under the servo.
With the steering all sorted it was just the front links to sort. But I dropped the ball here, I only ordered lower links in titanium, so for now I will have to stick with the plastic uppers until I can find some I like at a later date along with a few other choice upgrades to get it fully ready for the UK’s first ever Recon G6 event, so this bad boy better be ready.
New Shoes N Rubber Soles
The final items on the upgrade list where the wheels and tyres. Tyres there was only one choice for me the Voodoo U4 2.2 – I have these tyres on my yeti and I not only love the look but the performance is amazing.
Matching these with some Crawler Innovation foams which I did some secret modifications to give me a little edge over the rest. For the wheels I was torn and after some hunting online I found some great cheap scale looking bead-lock wheels from China, so without me being able to pick a favourite I ordered two sets and they still came in cheaper than some other brands for one set. These all went together great and had no real issues fitting the wheels to the tyres after my modifications to the foams. This was also made easier by the fact I didn’t run any extra weights in the wheels.
For initial testing and with the wonderful weather we were having I wasn’t going to fit my lights yet and I also want to mount a winch but for now that’s all I’m going to do to the little Bomber. Apart from give it a dame good spanking out testing it!
Snow Doesn’t Stop Play
The day after I finished the build was a Sunday, and what happened while I was sitting working on the Bomber? Yep, it snowed!
Now even though I’ve gone brushless I wasn’t going to let this hinder the testing and even thought it would make for some good video. So with the help of my ever-loving wife we ventured out to Bradgate Park with a huge flask of coffee, a few tools and a couple of cameras.
What we came back with was huge smiles on our faces and cold fingers. We only went through two battery packs but they were 4000mAh and they did last over an hour each, in fact the second pack didn’t quite go flat, but my transmitter did and the constant beeping was enough to make me stop.
I have to say with the betting that we gave (yes my wife drove me to it ) I was amazed at how well it could handle the snow. OK it wasn’t loads of snow but it was enough for us brits to get a sledge out and slide down a rocky hill.
At the very start of driving the rig there was a little stuttering in the higher rev range of the motor but after a little while this stopped. I had just put liquid insulation over the sensor wires and motor terminals, so maybe this hadn’t fully dried.
I’m really impressed with how well this Bomber drives and crawls. The long wheel base really helps in crawling up steep ledges – which I had tried a few weeks before when I came with Scott and his bomber in the dry but both failed – but now with the new tyres and extra wheel speed just gave me that edge.
I will admit there where some places that I couldn’t get up for toffee but snow covered slick rock can be a challenge to even walk on but that didn’t stop me trying.
Wheel-speed flat out was perfect, I was a little worried it might be too fast and I would lose some low end control but the motor was amazing. If you’ve got the money by all means go for the bigger names in motor manufacturing but the Toro has really impressed me. Of course the Mamba Max Pro isn’t a cheap esc but I have had that for probably 3 years now and run it in everything from 1/8th buggies, to a Wraith with 2.8 sand paddles and 6000kv motor, so it’s done me very well.
The Savox servo was also amazing and the huge power didn’t show any sign of faltering even in the cold and wet and being bound up in some tight spots. Both myself and my wife Sam had a great time, got plenty of video and photos and the truck stood up to everything I could throw at it (yep even the plastic WB8 shafts.)
Not Game Over
What am I going to do to the Bomber? As I have already said, the upper links on the front will be upgraded to either aluminium or titanium depending on what I can find. Though, stay away from the one piece alloy ones and instead go for ones with rod ends.
Some lights will be needed for the night stage of the Recon G6 so plenty of LED’s will be used, with maybe a secondary battery in the fuel cell in the back to power these.
I think it doesn’t really need a winch, but for looks and that just in case moment a winch will be picked out of my spares box and stealthily fitted somehow.
And then I think a colour change is in order. I do really like the scheme but I need to make this individual and with the name I’ve given the truck I have the perfect scheme in mind.
Long live the “F” Bomb!
- Good variety of after-market upgrades
- Proven Wraith and Yeti DNA
- A great all round rig, made even better
- Random grub screws where machine screws should have been
- Lack of Transmission grease
- Slipper pads stuck to plastic spur gear
For more on Axial Racing CLICK HERE
For more on the RR10 RTR & Kit CLICK HERE
For more on Vanquish Hop Ups CLICK HERE