Yes I think you have a good point. The old hair net designs were lighter in weight and I think the risk of a neck injury would be lower.
I have not seen any studies comparing the newer designs with the old hair net type. The coefficient of friction for leather varies.from about 0.2 to 0.6. Impacts tests on helmets often have above 0.5 according to some research. Leather can also tear
frictionhttps://www.engineersedge.com/coeffients_of_friction.htm
My guess would be leather hair net style would have lower protection and a lower risk of impact and lower neck injuries and easier to store.
Search found 2699 matches
- 1 Mar 2024, 4:36pm
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
- 28 Feb 2024, 3:29pm
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
Re: Review of neck injuries and cycle helmet use
http://www.ta.org.br/site2/Banco/7manua ... Helmet.pdf
Diagram A and the table of forces could be helpful.
The combined maximum come from impacts at 70 degrees for helmeted, v 65 degrees for no helmet. Scaling the distance to the XX and YY provides comparisons. The YY distance is roughly equal and the XX distance is about 26% larger for the helmeted profile.
Using the force estimates x distance, an indication of the relative bending forces on the neck can be calculated based on this simple two dimensional approach. The info suggests helmeted may incur about an extra 26% loading.
Is there any research providing estimates of bending moments about the neck for helmeted v no helmet?
Diagram A and the table of forces could be helpful.
The combined maximum come from impacts at 70 degrees for helmeted, v 65 degrees for no helmet. Scaling the distance to the XX and YY provides comparisons. The YY distance is roughly equal and the XX distance is about 26% larger for the helmeted profile.
Using the force estimates x distance, an indication of the relative bending forces on the neck can be calculated based on this simple two dimensional approach. The info suggests helmeted may incur about an extra 26% loading.
Is there any research providing estimates of bending moments about the neck for helmeted v no helmet?
- 28 Feb 2024, 10:21am
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
Re: Review of neck injuries and cycle helmet use
It looks like two issue stem from this discussion, Colin Clarke affiliation with Cycling UK and Campaigns, this goes back many years, for example, http://www.ta.org.br/site2/Banco/7manua ... Helmet.pdf when he was Hon Sec Cyclists' Touring Club,
Yorkshire and Humber Region, UK and had already campaigned for some years on cycling issues and projects.
The picture provided refers to Colin Clarke's affiliation to Cycling UK, that is correct.
The second aspect is how best not to raise any confusions between individuals research and Cycling UK policy documents. If a study refers to Cycling UK in the headings, then a disclaimer could be included, the views expressed are those of the authors, and not necessary of Cycling UK. If a study does not specifically refers to Cycling UK in the headings and the authors attributes the work to them, and make no claim of it stemming from Cycing UK, there would be no need to include a disclaimer.
In both cases the neck injury paper complies.
Yorkshire and Humber Region, UK and had already campaigned for some years on cycling issues and projects.
The picture provided refers to Colin Clarke's affiliation to Cycling UK, that is correct.
The second aspect is how best not to raise any confusions between individuals research and Cycling UK policy documents. If a study refers to Cycling UK in the headings, then a disclaimer could be included, the views expressed are those of the authors, and not necessary of Cycling UK. If a study does not specifically refers to Cycling UK in the headings and the authors attributes the work to them, and make no claim of it stemming from Cycing UK, there would be no need to include a disclaimer.
In both cases the neck injury paper complies.
- 27 Feb 2024, 6:08pm
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
Re: Review of neck injuries and cycle helmet use
The paper finished with
That is private researchers.Colin Clarke
Retired
Private researcher, Colin Clarke (0000-0002-0685-9874) (orcid.org)
- 27 Feb 2024, 4:20pm
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
Re: Review of neck injuries and cycle helmet use
I think there is a danger with studies being published and not providing all the information needed to compare sober cyclists and their injuries. Many studies provide results and do not specify how many had been drinking.
https://www.cyclinguk.org/briefing/cycle-helmets Cycling UK publish their views and nobody really think Colin Clarke's paper come from CyclingUK. because the author provides his name and email address,[removed by moderator for breach of forum guidelines]
Cyclists and Standards need to know the true effects of helmets to be able to provide the most suitable advice.
https://www.cyclinguk.org/briefing/cycle-helmets Cycling UK publish their views and nobody really think Colin Clarke's paper come from CyclingUK. because the author provides his name and email address,[removed by moderator for breach of forum guidelines]
Cyclists and Standards need to know the true effects of helmets to be able to provide the most suitable advice.
- 27 Feb 2024, 3:16pm
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
Re: Review of neck injuries and cycle helmet use
The paper contains more studies on neck injuries than previously published, 16 studies v 12 for Olivier and Creighton and 14 for Hoye.
It also separates child v adults that the two meta analysis did not. The findings suggest adults are at an increase risk of neck fractures.
Neck injuries are normally much lower in number than head injuries. The 16 studies all are presented by academics who will be well placed to agree or disagree with the author. It should be simple to check the figures, except some studies do not provide full details.
It also separates child v adults that the two meta analysis did not. The findings suggest adults are at an increase risk of neck fractures.
Neck injuries are normally much lower in number than head injuries. The 16 studies all are presented by academics who will be well placed to agree or disagree with the author. It should be simple to check the figures, except some studies do not provide full details.
- 27 Feb 2024, 9:31am
- Forum: Helmets & helmet discussion
- Topic: Review of neck injuries and cycle helmet use
- Replies: 44
- Views: 3557
Review of neck injuries and cycle helmet use
https://www.researchgate.net/publicatio ... helmet_use
This article considers whether cycle helmet use is of benefit or a disadvantage in terms of neck injuries and if the outcomes apply to both adults and children. Additional information relating to alcohol/drug use and other aspects for helmeted and non-helmeted cyclists are considered.
It reports '
This article considers whether cycle helmet use is of benefit or a disadvantage in terms of neck injuries and if the outcomes apply to both adults and children. Additional information relating to alcohol/drug use and other aspects for helmeted and non-helmeted cyclists are considered.
It reports '
andThe results in Table 1 for adults indicates helmet use increases cervical spine fractures by 50% of more'.
For children the odds ratio (OR) values suggest a benefit but the percentage for neck injury is lower for non-helmeted and teenager’s behaviour may have had an important affect.
- 2 Jan 2024, 7:51pm
- Forum: Helmets & helmet discussion
- Topic: Helmet law paper on Victoria, Australia
- Replies: 5
- Views: 773
Re: Helmet law paper on Victoria, Australia
https://www.cyclinguk.org/can-england
Clarke is listed on the map, 8 miles east of York, with contact details, Also his email address is at the end of the helmet paper. I think he would consider any points carefully.
Clarke is listed on the map, 8 miles east of York, with contact details, Also his email address is at the end of the helmet paper. I think he would consider any points carefully.
- 2 Jan 2024, 6:53pm
- Forum: Helmets & helmet discussion
- Topic: Helmet law paper on Victoria, Australia
- Replies: 5
- Views: 773
Re: Helmet law paper on Victoria, Australia
It's not dishonest but it does give leave open the question of what the relationship is, and I can't see a good reason to do that.
Clarke's background includes being a CTC Council member ( some twenty years ago) and working on the Campaigns group. He has submitted many AGM motions on campaigning issues. Has advised CTC/Cycling UK on technical points with regards to cycle helmets and consulted with them.
In 2015 the AGM included a motion on passing distances by Clarke that helped to draw attention to a major safety issue for cyclists.
He currently assists Cycling UK in campaigning by being a member of the Cycle Advisory Network.
The Researchgate website likes/requires people to disclose their affiliations and in Clarke case, CTC appears the most suitable to quote. It mainly indicates to readers a strong cycling/campaigning background, rather than just a cycling background. If anyone wanted clarification details could be provided.
Clarke's background includes being a CTC Council member ( some twenty years ago) and working on the Campaigns group. He has submitted many AGM motions on campaigning issues. Has advised CTC/Cycling UK on technical points with regards to cycle helmets and consulted with them.
In 2015 the AGM included a motion on passing distances by Clarke that helped to draw attention to a major safety issue for cyclists.
He currently assists Cycling UK in campaigning by being a member of the Cycle Advisory Network.
The Researchgate website likes/requires people to disclose their affiliations and in Clarke case, CTC appears the most suitable to quote. It mainly indicates to readers a strong cycling/campaigning background, rather than just a cycling background. If anyone wanted clarification details could be provided.
- 29 Dec 2023, 12:11pm
- Forum: Helmets & helmet discussion
- Topic: Helmet law paper on Victoria, Australia
- Replies: 5
- Views: 773
Helmet law paper on Victoria, Australia
https://www.researchgate.net/publicatio ... r_Victoria
Clarke considers the legal aspects to the helmet law in Victoria, Constitution aspects, courts, fines, health and safety aspects. The failings of the Government in Victoria to properly monitor the outcomes.
Clarke considers the legal aspects to the helmet law in Victoria, Constitution aspects, courts, fines, health and safety aspects. The failings of the Government in Victoria to properly monitor the outcomes.
- 23 Dec 2023, 8:30pm
- Forum: Helmets & helmet discussion
- Topic: Hovding Air Bag cycle helmet
- Replies: 6
- Views: 1663
Re: Hovding Air Bag cycle helmet
I was told the replacement battery cost could have been an issue.
- 19 Dec 2023, 11:19pm
- Forum: Campaigning & Public Policy
- Topic: National Transport Strategy
- Replies: 155
- Views: 39509
Re: National Transport Strategy
https://www.transportxtra.com/publicati ... rtid=74844 it says.
The minor roads are getting worse and need widespread improvements. Subsidize people working from home and add an extra tax on cars doing more than 10k per year and households having more than two vehicles
https://www.transportxtra.com/publicati ... cycling-ukThere are one million more children and young people walking, cycling or scootering to get to places than there were five years ago, according to a new Sport England report.
The minor roads are getting worse and need widespread improvements. Subsidize people working from home and add an extra tax on cars doing more than 10k per year and households having more than two vehicles
- 4 Dec 2023, 7:28pm
- Forum: Campaigning & Public Policy
- Topic: National Transport Strategy
- Replies: 155
- Views: 39509
Re: National Transport Strategy
On GB news TV tonight they were discussing immigration, and figures were mentioned, 5% extra people in 3 years, this seems too high an estimate, perhaps say 500,000 per year from say 60 million, 0.8% per year. In 5 years, an extra 4%. The UK road network
https://www.gov.uk/government/statistic ... itain-2021
https://nationalhighways.co.uk/media/vh ... -final.pdf
The publication lists 69 road schemes, assuming 10 miles per scheme, 690 miles expected
Assuming a population growth of 1% over 5 years, the road network would need to increase by 2478 miles to match existing levels of traffic density. The current highway and population plans, would result in extra congestion and reducing the quality of life. The immigration and transport strategy need to tie up, and take full account of cycling by allocating 2% of the transport budget for cycling infrastructure.
https://www.gov.uk/government/statistic ... itain-2021
Assuming the UK wants to increase the population, via natural growth and immigration, what figure would be suitable for road building?Headline figures
In 2021, the total length of roads in Great Britain was estimated to be 247,800 miles.
There were 31,900 miles of major road in Great Britain in 2021, consisting of:
2,300 miles of motorway (99% trunk, 1% principal)
29,500 miles of ‘A’ road (18% trunk, 82% principal)
There were 216,000 miles of minor road in Great Britain in 2021, consisting of:
18,900 miles of ‘B’ road
197,100 miles of ‘C’ and ‘U’ roads
https://nationalhighways.co.uk/media/vh ... -final.pdf
The publication lists 69 road schemes, assuming 10 miles per scheme, 690 miles expected
Assuming a population growth of 1% over 5 years, the road network would need to increase by 2478 miles to match existing levels of traffic density. The current highway and population plans, would result in extra congestion and reducing the quality of life. The immigration and transport strategy need to tie up, and take full account of cycling by allocating 2% of the transport budget for cycling infrastructure.
- 24 Oct 2023, 7:00pm
- Forum: Helmets & helmet discussion
- Topic: Helmet Bill and reasons to oppose it
- Replies: 294
- Views: 36815
Re: Helmet Bill and reasons to oppose it
Effects of bicycle helmet wearing on accident and injury rates
https://www.researchgate.net/publicatio ... jury_rates
Presented in 2019 at the GB Road Safety Conference
https://www.cla.asn.au/Article/081125Bi ... Policy.pdf
https://www.researchgate.net/publicatio ... jury_rates
Presented in 2019 at the GB Road Safety Conference
https://www.cla.asn.au/Article/081125Bi ... Policy.pdf
- 6 Oct 2023, 7:05pm
- Forum: Campaigning & Public Policy
- Topic: National Transport Strategy
- Replies: 155
- Views: 39509
Re: National Transport Strategy
Does Wales or Scotland have similar schemes?