Xray XB2 2WD Buggy Thread
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#1396
That's pretty cool I enjoy looking at that picture now haha. Both those hanger screws where always tight and regularly checked and also ran with a chassis protector. It's just crazy that I was literally going down a straight away when it broke. A few pro's also looked at the car and all said it looks like a weak design and should be reinforced better. The car is amazing though and it is the fastest and easiest to drive 2wd buggy I have ever owned.
#1397
Tech Elite
iTrader: (27)
Inspired by another xb2 user on this thread I've modeled a weight for the rear end of the car that should fit under 5the gearbox. I had a friend print it up for me so I can see how it fits. According to the model properties if made of brass it should weigh approx 80 grams. I could make it in 3 pieces so you can add or remove weigh if desired. If it fits in may have some machined.
#1398
Aluminum 7075 T6 is a great alloy. We use it where we can in aircraft. It can be a bit brittle depending on the machine operations and heat treatment/stress relief that is used on the parts. It can also suffer from surface corrosion issues if you don't treat it correctly, but Xray looks to use Cerakote on their parts which is a great coating.
In serious applications you always run finite element stress analysis to know exactly where your margins to failure are. I have no idea if Xray is this sophisticated in their engineering methods. Nor do we know exactly what operations are performed on their parts before they are kitted.
Again, there are lots of possibilities in tracing the root cause of a failure. Manufacturing defect that could affect a whole lot of parts. Like a defective mill bit that leaves stress risers in the part. Substandard material from the supplier that has voids or precipitates, again affecting an entire lot of parts. Or insufficient margin to failure, which could affect every part. We don't want Xray throwing material at everything, otherwise you would end up with a car that weights 1550 grams out of the box. Sometimes you just make a part too thin and need to revise the design to take care of load cases that you hadn't understood at the time of the original design. Hell oxygen embrittlement could even be an issue with this part!
We just don't know enough to trace the root cause, and frankly that is the job of the manufacturer and not the user. I would be happy to offer engineering services, as that is my profession, but I am sure they don't need it.
Based on the thorough nature of the design of the XB2 and XB4, which is exactly what attracted me to them...I would bet that Xray will determine a cause and come up with a corrective action.
In serious applications you always run finite element stress analysis to know exactly where your margins to failure are. I have no idea if Xray is this sophisticated in their engineering methods. Nor do we know exactly what operations are performed on their parts before they are kitted.
Again, there are lots of possibilities in tracing the root cause of a failure. Manufacturing defect that could affect a whole lot of parts. Like a defective mill bit that leaves stress risers in the part. Substandard material from the supplier that has voids or precipitates, again affecting an entire lot of parts. Or insufficient margin to failure, which could affect every part. We don't want Xray throwing material at everything, otherwise you would end up with a car that weights 1550 grams out of the box. Sometimes you just make a part too thin and need to revise the design to take care of load cases that you hadn't understood at the time of the original design. Hell oxygen embrittlement could even be an issue with this part!
We just don't know enough to trace the root cause, and frankly that is the job of the manufacturer and not the user. I would be happy to offer engineering services, as that is my profession, but I am sure they don't need it.
Based on the thorough nature of the design of the XB2 and XB4, which is exactly what attracted me to them...I would bet that Xray will determine a cause and come up with a corrective action.
#1401
If a loose screw breaks the toe block it should still be loose after failure, easy to check.
not having the car and thus going by the pictures the part does look really thin.
not having the car and thus going by the pictures the part does look really thin.
#1402
Tech Regular
Ahh I remember when xray had issues with their touring car pulling the screws for the ff hinge pin holder through the chassis when released.
Me and a friend questioned it on their forum with picture evidence. Got shot down saying it didn't happen and got banned pretty instantly.
Them eastern Europeans don't like it up em
Me and a friend questioned it on their forum with picture evidence. Got shot down saying it didn't happen and got banned pretty instantly.
Them eastern Europeans don't like it up em
#1404
Enough
Can we move past this example of one thing breaking. You have an avenue to report it to the people who can help. Nobody on this forum can do anything about it. I hate to say it, but everything can break. We have no idea how he assembled it or used it, except for what he tells us. He is upset, and I understand this. However, trying to get others to join him in bashing the car is wrong. If you are not happy, move on. You were given an option to get the part cheap to help out, that should really be the end of it. The did not help you out so that you can be a d/ck about it. I had a car with the wrong hanger, i did exactly as they said to do and got a new hanger. I provided SN for the 4wd and 2wd models and received hangers for both. If a problem is identified, it will be resolved.
#1406
Even though the ball diff comes factory pre-assembled I recommend to open it up and add black grease to the thrust bearing and clear ball diff grease to the diff rings and balls before breaking it in
XB2 Ball Adjustable Differential - Set - HUDY Spring Steel™
• For very-low to medium traction tracks
• Increases traction
• Externally adjustable
• HUDY Spring Steel™
• Additionally hardened
• Extra durable
• Long lifespan
• Ultra-smooth operation
• Factory pre-assembled
The XB2 ball differential is recommended for all XB2 configurations when used on very-low to medium-traction dirt or clay surfaces to increase traction. The externally-adjustable ball differential is machined from HUDY Spring Steel™ and is additionally hardened for extra durability and long lifespan. A high-quality carbide thrustbearing and carbide balls are included for ultra-smooth operation. The ball differential comes factory pre-assembled.
#325000 Ball Adjustable Differential - Set - HUDY Spring Steel™ - http://bit.ly/1SKbtRG
Bent
XB2 Ball Adjustable Differential - Set - HUDY Spring Steel™
• For very-low to medium traction tracks
• Increases traction
• Externally adjustable
• HUDY Spring Steel™
• Additionally hardened
• Extra durable
• Long lifespan
• Ultra-smooth operation
• Factory pre-assembled
The XB2 ball differential is recommended for all XB2 configurations when used on very-low to medium-traction dirt or clay surfaces to increase traction. The externally-adjustable ball differential is machined from HUDY Spring Steel™ and is additionally hardened for extra durability and long lifespan. A high-quality carbide thrustbearing and carbide balls are included for ultra-smooth operation. The ball differential comes factory pre-assembled.
#325000 Ball Adjustable Differential - Set - HUDY Spring Steel™ - http://bit.ly/1SKbtRG
#1408
Tech Rookie
I pre-apologize if this is a question that has been asked before, I don't have a lot of time at the moment to read through this entire thread (although I will soon). I'm seriously considering pre-ordering the dirt XB2 (about 90% there, was about to get a Schumacher KF2 but I reconsidered when I saw this car) and would like to pick up some basic replacement parts since I don't have any X-Ray stuff whatsoever. I'm primarily an on-road guy, and just wanting to play with off-road occasionally, so I'm not looking to go super insane with every hop-up, I just want to avoid ending a race-day early if I break something basic. Or if people have experienced issues with a part included with the car, I'd rather avoid issues and just buy the better part right off the bat.
Anyone have a list of recommended parts when starting off with this platform brand new? I will be running primarily 17.5 on a relatively large outdoor hard packed dirt track.
Edit: One specific question I have at the moment is what alloy servo arm works the best for this car? I assume it comes with a plastic horn, or none at all. Also, is there a preferred servo that easily drops into this car? I was considering a shorty to gain some space for the electronics. The last time I drove an off-road buggy was the RC10 when chassis space was plentiful and pretty much anything fit.
Anyone have a list of recommended parts when starting off with this platform brand new? I will be running primarily 17.5 on a relatively large outdoor hard packed dirt track.
Edit: One specific question I have at the moment is what alloy servo arm works the best for this car? I assume it comes with a plastic horn, or none at all. Also, is there a preferred servo that easily drops into this car? I was considering a shorty to gain some space for the electronics. The last time I drove an off-road buggy was the RC10 when chassis space was plentiful and pretty much anything fit.
#1410
Tech Lord
iTrader: (52)
The solution is to use Loctite on the screws to make sure they don't come loose and protrude through the chassis.
However I'm not saying that for a future release there could be a revised version of the hinge pin holder to make it withstand the stress from a screw coming loose.
But for the moment the solution is to use Loctite to make sure they stay in place.
Bent
However I'm not saying that for a future release there could be a revised version of the hinge pin holder to make it withstand the stress from a screw coming loose.
But for the moment the solution is to use Loctite to make sure they stay in place.
Bent
I'm sure it will get worked out without issue.