Tokyo Olympics 2020 - Cycling

['Dale]

4 minutes ago, Frosty said:

Not sure what's worse, a gold helmet or a gold bike.

I suspect it won’t be too bling. Maybe just the first coat? Let’s see. 

[Sid the Sloth]

30 minutes ago, 'Dale said:

I suspect it won’t be too bling. Maybe just the first coat? Let’s see. 

I reckon it will just get some Pinarello branding on it, why waste grams on paint coats...  

[lechatnoir]

2 hours ago, Jehosefat said:

Aussie oke just ate track after his handlebars failed ???? Thankfully he looks ok

that was just crazy. would be keen to see some hi-res photos if they exist. it was a freak thing. Similar to that AG2R rider whose bars failed.

[FootballingCyclist]

On 7/30/2021 at 4:30 PM, dsw said:

The surprise package for me was Stefan de Bod who beat a few very big names in the ITT and also at least finished the Road race while many bigger starts did not even manage to do that.  Not bad at all for a rider who was drafted in as a replacement. 

I scored Ashleigh the highest as she did very well in the road race without the benefit of a team ( Carla was in the break before bailing and provided no support) while she also did excellent in the ITT. 

Many riders weren't allowed to finish due to some ruling about a time cut which they weren't aware of.

[Mountain Bru]

16 hours ago, 'Dale said:

Meanwhile… ????????

This will really help Movistar know who to randomly mark 

[Nick]

44 minutes ago, lechatnoir said:

that was just crazy. would be keen to see some hi-res photos if they exist. it was a freak thing. Similar to that AG2R rider whose bars failed.

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

 

[DieselnDust]

59 minutes ago, FootballingCyclist said:

Many riders weren't allowed to finish due to some ruling about a time cut which they weren't aware of.

 

 

Oh they knew about the 12min cut off if they fell that far behind the peloton. The problem was they were held at the last feed station by a commisaire  while still within the 12min allowed. They were then held for 15min and then released so they were in effect removed from the race before they fell 12min behind. This is likely a mistake on the part of the race commissaires but CSA got blamed for sending too many officials

[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.