Tokyo Olympics 2020 - Cycling

[shaper]

4 hours ago, Nick said:

Not exactly hi-res but best I can find for now.

 

https://www.cyclingnews.com/amp/news/australias-snapped-handlebar-3d-printed-since-removed-from-sale-reports-claim/

[DieselnDust]

3d printed titanium??!!! on a saleable item......

This tech is still under development for manufacture of turbine blades. Bastion uses this tech for printing their frame lugs which is a much lower stress environment. The article blames bolt overtightening but it could just as easily be that the section is too thin as 3D printing such thin walled parts  currently delivers very inconsistent wall thickness. More work required in the R&D would be responsible

[shaper]

Sockgate or more aptly tapegate.... 

https://www.bikeradar.com/news/danish-track-team-shin-tape/

[Vetplant]

46 minutes ago, DieselnDust said:

3d printed titanium??!!! on a saleable item......

This tech is still under development for manufacture of turbine blades. Bastion uses this tech for printing their frame lugs which is a much lower stress environment. The article blames bolt overtightening but it could just as easily be that the section is too thin as 3D printing such thin walled parts  currently delivers very inconsistent wall thickness. More work required in the R&D would be responsible

Agree 10 000%

Do bottle cages or some non-safety-critical parts.

The stem of a bike is the absolute last thing I will 3d print. 

 

[Zebra]

Germany just set a WR in Women’s track…

[Mountain Bru]

3 hours ago, DieselnDust said:

3d printed titanium??!!! on a saleable item......

This tech is still under development for manufacture of turbine blades. Bastion uses this tech for printing their frame lugs which is a much lower stress environment. The article blames bolt overtightening but it could just as easily be that the section is too thin as 3D printing such thin walled parts  currently delivers very inconsistent wall thickness. More work required in the R&D would be responsible

I think the titanium 3D printing technology is sufficiently advanced already to produce reliable parts. I know they have one at the CSIR here in Pretoria and I remember going to a talk about 3 years ago where they seemed to be getting good results. If I remember correctly, they were trying to print aircraft parts at the time, and seemed happy with the output they were getting. And that's at a state owned company in South Africa... I would expect that a specialist commercial company overseas could potentially be far ahead of us, and also would have proper quality control of printed items to ensure that wall thicknesses are correct and that layers have fused correctly etc. 

 

The over tightened bolt sounds plausible to me though. I mean even on carbon fibre, which is something we all trust without thinking, overtightening a bolt can cause catastrophic failure. Also, if there was an inherent problem with the bars, you'd expect that there would be more problems with them failing seen as the entire team has been training on them for months. 1 failure in a race points more towards an isolated problem rather than a problem with the component design or manufacturing itself. 

Edited August 2, 2021 by Mountain Bru

[The Ouzo]

7 hours ago, Mountain Bru said:

I think the titanium 3D printing technology is sufficiently advanced already to produce reliable parts. I know they have one at the CSIR here in Pretoria and I remember going to a talk about 3 years ago where they seemed to be getting good results. If I remember correctly, they were trying to print aircraft parts at the time, and seemed happy with the output they were getting. And that's at a state owned company in South Africa... I would expect that a specialist commercial company overseas could potentially be far ahead of us, and also would have proper quality control of printed items to ensure that wall thicknesses are correct and that layers have fused correctly etc. 

 

The over tightened bolt sounds plausible to me though. I mean even on carbon fibre, which is something we all trust without thinking, overtightening a bolt can cause catastrophic failure. Also, if there was an inherent problem with the bars, you'd expect that there would be more problems with them failing seen as the entire team has been training on them for months. 1 failure in a race points more towards an isolated problem rather than a problem with the component design or manufacturing itself. 

you would be surprised at how advanced the CSIR is. My brother in law worked for them for a while (probably about 5 years ago) and some of the inside info suggests they are still doing well.

[shaper]

Bastion confirms it was their handlebars that failed https://cyclingtips.com/2021/08/bastion-is-investigating-australias-broken-track-pursuit-handlebar/

[Vetplant]

9 minutes ago, ouzo said:

you would be surprised at how advanced the CSIR is. My brother in law worked for them for a while (probably about 5 years ago) and some of the inside info suggests they are still doing well.

CSIR is set-up as a research body. The KPR's of individuals drive them to publish research, they are not driven for real-world results.

The real-world successes come when the Private Sector joins them on a project.

Unfortunately, the private partner on that 3D printer went bust. So the printer has been idling for about 3 years now.

[Matthew du preez]

where can i watch the olympics online? (dont have dstv)  cant seem to find a live stream of it

[lechatnoir]

4 minutes ago, Matthew du preez said:

where can i watch the olympics online? (dont have dstv)  cant seem to find a live stream of it

https://tiz-cycling-live.io/live.php is up

[Matthew du preez]

1 minute ago, lechatnoir said:

https://tiz-cycling-live.io/live.php is up

cool thanks.... any live streams for the other sports?

[TNT1]

Just now, Matthew du preez said:

cool thanks.... any live streams for the other sports?

BBC iplayer...

[kosmonooit]

1 minute ago, Matthew du preez said:

cool thanks.... any live streams for the other sports?

BBC ... via www.getflix.com.au

[NotSoBigBen]

"I would love to give this message to any bike rider in the world, and especially young riders. Please enjoy riding your bike to the fullest, have fun with your mates, admire nature and the animals you get to see and forget about the numbers. You will get fast by riding your bike not by producing some certain numbers. Yes, you need to train and you need to overcome challenges and setbacks but please do it with your heart. Ride your bike for one reason, because it is fun."

Pinkbike.com: Jolanda Neff Raced on 'Legs & Heart' Without a Bike Computer or Power Meter at the Tokyo Olympics.
https://www.pinkbike.com/news/jolanda-neff-raced-on-legs-and-heart-without-a-bike-computer-at-tokyo-olympics.html

[Matthew du preez]

thanks