42099 CV joints damage after use

[suffocation]

Just now, Mechbuilds said:

Well in some countries there aren't any ad's that are misleading. Warning banner or not. 
Guess it's an american thing? 

Don't kid yourself. There are misleading ads in every country - it's just a matter of how misleading they are, depending on local sensitivities and on how far the law can be bent.

[sirslayer]

'cough' 'cough' .. what im trying to say is for an example, the Russian Mil-24 Hind helicopters, The best helicopter man ever invented has an export version, the Mil-35 helicopter that is a reduced in armor, digital equipment, ect, ect..    So maybe Lego by chance introduced the USA market first for the Lego 42099 which can be in Mil-24 Hind grade....    and is that sugar canes in the video I posted.. if any one reads my sirslayer thread .. you know what im talking about..

[agrof]

OK, my bad, I did not watch the video from the beginning - I skipped the text as usual for any online blabla. Please don't stone me for that, I remember the relevant South Park episode. 

Edited August 29, 2019 by agrof

[kbalage]

9 minutes ago, sirslayer said:

'cough' 'cough' .. what im trying to say is for an example, the Russian Mil-24 Hind helicopters, The best helicopter man ever invented has an export version, the Mil-35 helicopter that is a reduced in armor, digital equipment, ect, ect..    So maybe Lego by chance introduced the USA market first for the Lego 42099 which can be in Mil-24 Hind grade....    and is that sugar canes in the video I posted.. if any one reads my sirslayer thread .. you know what im talking about..

I don't think it is necessary to press that "sugar cane" button further. So far there were only plants produced of that material, soft and easy to recognise. No need for any conspiracy theories.

I checked my hubs & joints after several hours of play with 42099 outside, usually stressing them with lower gearing/higher torque and heavier Power Puller wheels. I only see some minimal damage on them, far less than I would expect from e.g. the old CV joints.

[efferman]

Why not using Printed parts for high stress aplications like Buggymotors with lipo doping??

IMG_1036 by Michael Wirth, auf Flickr

[sirslayer]

@kbalage im surprised you said that..    https://www.lego.com/en-us/aboutus/news-room/2018/march/pfp/    

but you don;t know is not your fault..   I been weighing technics elements for a couple a years and you don't know what I have discovered recently with the plant based Lego bricks...soon your RC MOC will follow my dusty trails >> 

 

Edited August 29, 2019 by sirslayer

[kbalage]

@sirslayer I don't know how that article supports your theory. A quote from that page: 

The sustainable product range covers LEGO® botanical elements such as leaves, bushes and trees made entirely from plant-based plastic.

[Andman]

12 minutes ago, sirslayer said:

@kbalage im surprised you said that..    https://www.lego.com/en-us/aboutus/news-room/2018/march/pfp/    

but you don;t know is not your fault..   I been weighing technics elements for a couple a years and you don't know what I have discovered recently with the plant based Lego bricks...soon your RC MOC will follow my dusty trails >> 

 

What did you discover?

[sirslayer]

@kbalage its dated 2018 you knucklehead!!    ....  Lighter weight!! is the discovery.. and for example.. when I purchase technic element for Legos pick a brick website .. All same elements weight perfectly and a letter stating its all hand picked 

Edited August 29, 2019 by sirslayer

[kbalage]

@sirslayer yes it's from 2018, what is your point exactly again?

Oh and it also says The new sustainable LEGO elements are made from polyethylene, which is a soft, durable and flexible plastic. So it could be used in flex axles maybe, but not in any other Technic parts.

[Andman]

3 minutes ago, sirslayer said:

@kbalage its dated 2018 you knucklehead!!    ....  Lighter weight!! is the discovery..

Sorry but I need a bit more than just your words. Any evidence? Pictures of same items with different weight?

Edited August 29, 2019 by Andman

[sirslayer]

its a long thread 

https://www.eurobricks.com/forum/index.php?/forums/topic/159866-sirslayers-chassis-color-the-world-with-blacken/

@kbalage read my thread 

Edited August 29, 2019 by sirslayer

[Andman]

2 minutes ago, sirslayer said:

its a long thread 

https://www.eurobricks.com/forum/index.php?/forums/topic/159866-sirslayers-chassis-color-the-world-with-blacken/

@kbalage read my thread 

You are comparing same item with different colours. Did you find weight differences between same items with same colour?

[kbalage]

@sirslayer your thread is all over the place, it's very difficult to find the related content. All I see there is that you measured the difference between the plastic and the sugar cane-based leaves, then you discovered some weight difference between the different coloured plastics. I still don't know how did you arrive to the conclusion that there are other parts containing sugar cane than the plants. 

[sirslayer]

@Andman yes... black tends to be lighter in weight if compared to another color of the same element .. dark blue gray being the heaviest 

 

@kbalage you have to wait  till my report and observations is done.. 

I even have a rainbow of weights if your read all the thread 

its still proves my point about sugar cane and enough said 

 

Edited August 29, 2019 by sirslayer
it seems its not fair

[Andman]

@sirslayer, Would you mind to make your thesis clear again? And sorry to say this, but @kbalage is right. The related info is difficult to find. Also... the only one who is acting a bit aggressiv and is insulting, is you. Remember? "Knucklehead"? There was no need for insults.

Would you also explain the whole picture?

Edited August 29, 2019 by Andman

[sirslayer]

if you know anything about competition racing.. then I can for you but this is about the 42099 cv-joints 

[Cumulonimbus]

Take a deep breath; I’m sure nobody here is out to insult you or your work. It’s an interesting theory, but you will need a lot more substantial data to proof it’s more than a theory.

The first issue is the fact that your data seems to be very anecdotal. Maybe you have more data than you can show at the moment, but so far I don’t think you have enough data points to draw any conclusions yet. The weight differences are so small that I can image a lot of factors playing a role here:

• Variations in material batches
• Multiple material suppliers
• Weight variation of the different additives which are used to tweak certain properties
• Variation in humidity during production and measurement

To see if these differences are even significant, you will need to weigh many more parts to see which variable (or combinations of variables) you are actually measuring. Ideally, you will need to single out the effect of each variable, for example weighing dozens of identical parts in the same color but from from different production years.

The second issue I have is the fact that you are only measuring weight (a part property) while you want to make a claim about density (a material property). You assume the volume of the parts is constant between parts, but you will need to measure this as well to be sure (Archimedes will be your friend here). Again, there are a lot of variables which can have an effect on the volume of two seemingly identical parts:

• Different molds for identical parts, for example in separate factories
• Variations between parts made with a multiple cavity mould
• New or updated moulds for a long running part
• Slight volume variations due to wear in the mould over the years

In short: there are a lot of possible explanations for the observed difference in weight, even before you start to consider a theory like TLG cutting ABS with another (inferior?) material.

[sirslayer]

Density is the clue and yes I have a collection of data to share if you have any yourself.. and please buy a scale that measures 0.0001 of a gram and do your own homework..  I just wonder if there is a difference in grade in the cv-joints from different locations..     

[Cumulonimbus]

32 minutes ago, sirslayer said:

... buy a scale ...  do your own homework.

Not sure if I like your commanding tone, I don't have to do anything. To be honest, I couldn't care less what compound goes into the parts. Personally, I think it's already impressive that TLG makes load bearing injection moulded parts with an intended lifespan of years without using glass-filled high-end plastic like the industry does. So an unlubricated replaceable plastic parts wears when you expose it to high or prolonged loads, big deal. Even IF TLG puts an additive from a sustainable source into its ABS parts to reduce the impact of their products on our world, wouldn't that be a positive evolution? 

48 minutes ago, sirslayer said:

 I just wonder if there is a difference in grade in the cv-joints from different locations..     

As I tried to explain before, there probably will be minute differences between parts all of the worlds, simply because the chance is high that they are made in several locations. If you insinuate that TLG is intentionally and malignantly reducing the quality of parts intended for a certain market, I think you are seeing ghosts. Good luck on your wild goose chase.

 

[suffocation]

I read on teh intarnet that the Koch brothers reportedly conspired with TLG to make us unhappy with sustainable Lego so we'd demand good ol' ABS back and they could sell more oil and that TLG is actually owned by the ghost of Papa Doc. I read it on teh intarnet so it must be true.

Edited August 29, 2019 by suffocation

[Zerobricks]

@Jim Can you please split the topic to one about actual CV joints and other about manufactoring finesesses?

 

[dr_spock]

Plastic CV joints aren't that great. I used the CV joints from the 8070 Supercar in a GBC.  It kept coming apart after some usage.   Metal and lots of lube is the way for longevity. 

[Mechbuilds]

2 hours ago, Cumulonimbus said:

Not sure if I like your commanding tone, I don't have to do anything. To be honest, I couldn't care less what compound goes into the parts. Personally, I think it's already impressive that TLG makes load bearing injection moulded parts with an intended lifespan of years without using glass-filled high-end plastic like the industry does. So an unlubricated replaceable plastic parts wears when you expose it to high or prolonged loads, big deal. Even IF TLG puts an additive from a sustainable source into its ABS parts to reduce the impact of their products on our world, wouldn't that be a positive evolution? 

As I tried to explain before, there probably will be minute differences between parts all of the worlds, simply because the chance is high that they are made in several locations. If you insinuate that TLG is intentionally and malignantly reducing the quality of parts intended for a certain market, I think you are seeing ghosts. Good luck on your wild goose chase.

 

 

 

On 8/28/2019 at 3:44 PM, Zerobricks said:

I noticed CV joints from 42099 are very prone to damage, even at low torque conditions.

Here's an example of the CV joint which is visibly damaged after being spun in my hands at maximum angle without the use of any gears or axle to increase torque:

Next is a damage done to a CV joint by an old XL motor at some 25 degrees when stalled:

 

Hmm.. 


Also i need to add that i couldn't do any visible damage to the old CV joints simply by spinning them at max angle by hand.. Heck, i even had them over the maximum angle and spun by an XL motor and they just skipped sideways without getting permanent visible damage.. 

There we have brand new CV joints that are getting destroyed simply by being spun by hand.. 

Edited August 29, 2019 by Mechbuilds

[TeamThrifty]

@sirslayer If you've got something significant and of interest, then post it as @kbalage asked... don't hint and dodge and swerve. If there's actual evidence then the matter is resolved, surely? If there's no evidence, then the matter is also resolved... at the moment it sounds like vague conspiracy theories to an independent observer.. Put up or shut up?

..and ultimately, a lot of fuss over a problem that doesn't actually exist. Under normal use, the parts are fine. If you use more power motors or batteries, then use stronger 3rd party printed parts as @efferman said. Its not rocket science!