Kraton 2nd bash with a brand new K4S v2.5! My heart is bleeding :D

[Barmaleus]

@Tex Koder @Gedrick
Guys, I've made more photos. Can you decipher any more info out of those? I am an absolute zero in 3D printing related stuff. Can it really be something other than TPU? Or, perhaps, it was printed using wrong technique? I asked to print from TPU with 100% infill. The cost was around 40eur. Which is rather high, but I was expecting the wing to last for a long time.

I am no extreme basher. New to the RC. The wing survived for maybe 30 packs or so. The last few bashes were rough, as I tried to learn jumping. Yes, the car was crashing and landing badly from time to time. On grass. Not at extreme speeds for sure. Height maybe 1m max or so, as I am just learning. The rest of the parts are fine (except for the plastic pivot balls, they are an absolute joke, lol).

Could temperature affect the wing rigidity? We are in a +4... +10C (39.2-50F) area these days.

Thank you!

 

[Gedrick]

I'm still going with not TPU, those fractures simply can't happen unless you took a sawzall to it.. can you bend the wing completely in half without it snapping? If so, that's TPU. Otherwise it's something else.

 

[Barmaleus]

@Gedrick Here is a video I just recorded trying to break the rest of the wing

 

[Gedrick]

Wow.. ok.. yes that definitely looks like TPU now.. Well color me shocked, that's very surprising.. Now I'm wondering what was the crash that caused that!

 

[Barmaleus]

@Gedrick Well, there is a small grass bump that I use as a springboard. The car would fly around 3-4m depending on the speed (I don't think I am going even half of the max speed). Maybe 1m in height. Then it may crash into grass/soil if I am not controlling it properly. It did crash rather heavily on the wing a few times, that I don't deny

When I was just surface bashing with occasional flips - the wing was fine.

 

[Tex Koder]

@Tex Koder @Gedrick
Guys, I've made more photos. Can you decipher any more info out of those? I am an absolute zero in 3D printing related stuff. Can it really be something other than TPU? Or, perhaps, it was printed using wrong technique? I asked to print from TPU with 100% infill. The cost was around 40eur. Which is rather high, but I was expecting the wing to last for a long time.

I am no extreme basher. New to the RC. The wing survived for maybe 30 packs or so. The last few bashes were rough, as I tried to learn jumping. Yes, the car was crashing and landing badly from time to time. On grass. Not at extreme speeds for sure. Height maybe 1m max or so, as I am just learning. The rest of the parts are fine (except for the plastic pivot balls, they are an absolute joke, lol).

Could temperature affect the wing rigidity? We are in a +4... +10C (39.2-50F) area these days.

Thank you!

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Okay.
That's very cold temperatures! (Especially for thin extruded plastics/filaments)

TPU could behave differently.. like a more solid plastic and possibly shatter like that.

We should have asked what weather temps you were bashing in.



You can re-test that TPU wing once it's froze a bit in cold temperature and do the bending test.
I bet it would break.

 

[Barmaleus]

@Tex Koder Yep, low temps is the only reason I can think of. I'll test it soon.

 

[Gedrick]

@Tex Koder Yep, low temps is the only reason I can think of. I'll test it soon.

Heck you could throw the thing in the freezer for a bit, and hit it with a temp gun to get it around that target, and see how it reacts to the temperature change right then and there.

 

[Barmaleus]

@Gedrick Freezer is the next step! Today I actually tested with the wing being in a refrigerator for a few days )