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What? A YetiXL?

I have the castle 1717 1600kv in my Redcat XBE with the XL2 esc. I run it with 6s and 8s and it is fast!
I also have a few brushless motors that are 2200 kv in both TP Power 4050 and also the Leopard 4075 that I use in my boats mostly. I use them in my revos also.
https://www.youtube.com/watch?v=3NE92iYOB3s
The boat is over 42'' long
It is my first boat.Iit was a ATR that I completly redid the boat. I have since bought a larger 56" Catamaran hull that is built from parts that I made or ordered online. I haven't run it but once and it is on the back burner untill I buy some more lipos for it.
 
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Jason had his Yeti XL flying around Crawlapalooza today. It seems pretty tough and looks like it handles well. I was pretty impressed with its size and well as how light weight it is.
Add a rear sway bar and it will be good to go.
 
With the Traxxas summit having locking diffs and 2 speed trans out of the box. I will be Yeti XL looks that makes the sale. It will be fun to see the two compete as top dog after you build the Yeti to the summits level. Even then locking diffs when you need them is a tough one to beat. The look and size Yeti XL has hands down though!
The more I think about this the more I want to make a buggy that has both the looks and the qualities of the Summit. Hmmm???
http://rcdriver.com/wp-content/uploads/2014/10/IMG_9622.jpg
 
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With a 2200kv motor, This buggy is going to fly, and also break easily.. I will wait a while before I think about one of these , parts are going to be on backorder for a while at first..
 
ittybitty said:
So the Yeti comes with a sway bar...but the XL doesn't?
Click to expand...


Jason's was box stock and it didn't have one. A plastic sway bar on that big of a rig may not have held up anyways. After seeing it bash around, it's not that big of an issue. Crank the rear shock down or make a temporary one and zip tie it to the lowers. Looking back at the Axial video, that is why the rig came off some jumps off camber and the ass end droops out quickly. It's wide and lightweight so it handles fine box stock.
 
I'm noticing a handful of interesting things in the manual.

First, there are several parts labeled as "MT" XXXXX. This seems odd as Axial normally links any new part directly to the vehicle it's being used on, just as in this manual almost everything is labeled as a Yeti XL part. Does this mean we may be seeing a "MT" soon? One would assume that means monster truck, but hopefully it means a solid axle AR60 XL Monster Truck so that we can make it into some large scale trail trucks. So much fun to guess!

1.png

2.png

4.png



Also, it looks like the design of the rear axle shafts has changed as time has gone on. It appears they missed it in the manual and one of the old design versions got slipped in. I would assume they went to a dog bone style at the diff for a reason. Hard to say if that is because of bending or not, but that would be my guess. Rear housing may have a little flex in it.
 

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Looking into the rear axle. It appears that 4 - 3mm x 12 screws are what secures the diff. These screws thread only into the plastic housing, no locknuts or anything on the back side. This has worked pretty well on the Wraith axle for quite some time, but I wonder how that will work on something that comes stock with a motor and ESC capable of 6s power! It seems like a whole new world of stresses compared to what we have seen before.

All speculation until I personally tear one apart.
 

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More speculation! :ror:

Diffs are using 2 - 15x21x4mm bearings. They are a pretty thin bearing, made me wonder on the loading.



Just going to Boca for basic numbers, looks like each bearing is rated at 96 Kgf each. That is based on a fairly nice bearing, not the "Econo" bearings that they have listed for other sizes like we typically use in RC.
15x21x4,MR6702-ZZC,Metric, Radial Bearings

1.png

If I choose a similar quality bearing for the Wraith, the 5x11x4mm bearings are rated to hold 73 Kgf each.
5x11x4,MR115-ZZC,Metric, Radial Bearings


As a comparison of a truck with similar sized tires and power to the XL, I opened up a Savage Flux manual. On their input shaft they use 8x16x5mm bearings. The load rating on those bearings (again choosing a similar quality) is 128 Kgf.
8x16x5,MR688-ZZ/C3C,Metric, Radial Bearings

2.png
 
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Szczerba said:
A plastic sway bar on that big of a rig may not have held up anyways.
Click to expand...

The Yeti one is all metal - they just hid it in a plastic housing to increase scale appearance. The plastic is just for looks.

Harley - the look of that new idea Pinion is very odd. I'd love to see this in pictures, not just drawings to be able to really see it.
 
binaryterror said:
Harley - the look of that new idea Pinion is very odd. I'd love to see this in pictures, not just drawings to be able to really see it.
Click to expand...

The new Vaterra Ascendor uses a system similar, in that the cup side of the CV driveshaft is incorporated into the pinion shaft as well. However, the Vaterra pinion gear bolts onto the input shaft. The bolting of the pinion gear looks to be causing an issue in the Vaterra though. The square keyed piece on the back side of the gear looks to be causing a stress riser. I broke my gears in the axles last weekend actually.

The Axial version is a nice one piece design, and they are using CNC cut gears in the box which is awesome. I suspect the gears in these will be pretty strong, but I have never dealt with this level of power in a car. I never owned anything running 6s on this size motor. So I'm anxious to see the level of abuse it puts on parts.
 
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