Search found 5575 matches

by roubaixtuesday
17 Mar 2024, 6:44pm
Forum: Does anyone know … ?
Topic: Touring shoes for bunions and wide feet
Replies: 15
Views: 443

Re: Touring shoes for bunions and wide feet

Do you really need spds?

Touring I just use normal shoes or sandals.

Perhaps some leather walking shoes could work with flats?

Whalley warm and dry (best boots shop in the world IMO) will steam leather boots or shoes to fit bunions.
by roubaixtuesday
17 Mar 2024, 12:36pm
Forum: The Tea Shop
Topic: BEVs
Replies: 2120
Views: 108168

Re: BEVs

Jdsk wrote: 17 Mar 2024, 12:33pm
roubaixtuesday wrote: 17 Mar 2024, 12:31pmCaveat: back of the fag packet numbers, could be a fatal mistake in them.
Thanks

It's always worth including the numbers. Even if they're wrong we'll get to the correction quicker!

: - )

Jonathan
Again!
by roubaixtuesday
17 Mar 2024, 12:35pm
Forum: The Tea Shop
Topic: BEVs
Replies: 2120
Views: 108168

Re: BEVs

Jdsk wrote: 17 Mar 2024, 12:20pm
Jdsk wrote: 17 Mar 2024, 12:17pmIf it's the former then it is possible to gain a few miles per day.
An attempt to put some numbers on it:
https://www.forbes.com/sites/billrobers ... 73aabb1ac6

For a fully-covered CLO they come up with 245 km "in ideal conditions" and 69 km for a production vehicle.

As always: more numbers welcome. : - )

Jonathan
We crossed :-)
by roubaixtuesday
17 Mar 2024, 12:31pm
Forum: The Tea Shop
Topic: BEVs
Replies: 2120
Views: 108168

Re: BEVs

Nearholmer wrote: 17 Mar 2024, 11:10am You should be able to get enough solar energy from two square meters of panels in average UK conditions (= 1000 kWh/sq m.year) to cover 5000 miles (@ typical 0.3kWh/mile).

Of course, that’s pretty unlikely to be how it worked in practice, unless you made sure your driving profile closely matched hours of good daylight, so barely drove in January and February maybe, but it indicates that you should get “free driving” in the summer, if you charge at home.

There is a (Dutch, I think) firm that has developed a practical BEV that is skinned almost entirely with solar cells, although it doesn’t look obviously so, and they have been running their prototype in “typical user profile” almost entirely using self-charging. They’re confident that in the southern half of Europe it can be self-sustaining in typical use.

If all BEVs came with at least a significant part skinned in solar cells, it wouldn’t entirely do away with the need to charge from the grid, but it would make a huge difference, and given that some of the worst air-pollution takes place around cities in very sunny climates, it could improve air quality in many ways other than reducing CO2 emissions.
Thank you for quantifying the numbers.

Unfortunately, I think you've made a significant omission.

According to my quick google (which may be wrong), the 1000 kwH/m2/year is total insolation, not solar output. You need to multiply by panel efficiency, which I believe is typically 20%.

https://en.m.wikipedia.org/wiki/Solar_p ... ed_Kingdom

Additionally, many (most?) cars will be parked in positions where their exposure to sunlight is far from optimum.

So you're probably looking at closer to 500 than 5000 miles, and likely much more economical to invest the money in fixed solar.

Caveat: back of the fag packet numbers, could be a fatal mistake in them.
by roubaixtuesday
16 Mar 2024, 10:11pm
Forum: Bikes & Bits – Technical section
Topic: Bike recommendation or considerations
Replies: 35
Views: 818

Re: Bike recommendation or considerations

Not sure why you want fat tyres.

What's wrong with the decathlon suggestion made upthread.

I works personally avoid random cheap brands.
by roubaixtuesday
16 Mar 2024, 2:03pm
Forum: Bikes & Bits – Technical section
Topic: Bike recommendation or considerations
Replies: 35
Views: 818

Re: Bike recommendation or considerations

Sounds to me like a hardtail MTB probably fits the bill.

Generally Decathlon have a good reputation at the cheap end of the market, and to my surprise, they do e mountain bikes below £1000.

eg https://www.decathlon.co.uk/p/27-5-hard ... R-p-311489

I've no personal experience of it.
by roubaixtuesday
15 Mar 2024, 9:20am
Forum: Bikes & Bits – Technical section
Topic: Well that was an interesting afternoon....
Replies: 14
Views: 793

Re: Well that was an interesting afternoon....

PaulK wrote: 15 Mar 2024, 7:12am The one thing leaves me wondering, Is the tyres which are obviously narrower than its cousin on the Domaine and again UK roads are NOT great so i don't want to be permanently in the shop getting my wheels trued.
I don't think a size in tyres make much difference to wheel robustness.

Comfort yes, and opinions vary on efficiency, but not really robustness IMO.

No idea what the wheels are like on your new bike, but generally road bikes do tend to come with light but not very robust wheels.
by roubaixtuesday
14 Mar 2024, 7:16pm
Forum: The Tea Shop
Topic: Are you "Infected by a remainer mind virus"?
Replies: 920
Views: 831570

Re: Are you "Infected by a remainer mind virus"?

al_yrpal wrote: 14 Mar 2024, 6:36pm So, according to some Remainers the ordinary voter cant be represented by someone they vote for.

Doesnt really surprise me :lol: Anyway we are out of the EU something ordinary people voted for. The establishment and most of academia will have to get over it...

Al
I think the people having to get over it are particularly those who voted for it.

With, as this report shows, a lot more bureaucracy, on top of less wealth, a lot more immigration, less trade, less money for the NHS.

All the exact opposite of what were told they voted for.
by roubaixtuesday
14 Mar 2024, 12:49pm
Forum: The Tea Shop
Topic: Are you "Infected by a remainer mind virus"?
Replies: 920
Views: 831570

Re: Are you "Infected by a remainer mind virus"?

Psamathe wrote: 14 Mar 2024, 12:47pm
al_yrpal wrote: 14 Mar 2024, 10:32am Unanswered...

How are EU commissioners chosen and put in charge?

Where is the EU HQ Brussels or Strasbourg?

How much were we paying the EU?

How much did the EU gravy train cost and what is it now Horizon is back?

Al
How are EU commissioners chosen and put in charge?
Nominated by Member States (democratically elected by the electorate), vetted by Eurpean Parliament - so completely democratic and in many respects better than eg the UK system where we have a PM who didn't get a single vote to aquire his office and a Government of Ministers appointed by the same M who didn't get a single vote to aquire office!

...

Google might not be your friend but all your questions are answered by a few seconds in a search engine so no point in me doing the work for you.

Ian
This may shock you, but it's possible the purpose of asking the questions was not to find out the answers.
by roubaixtuesday
14 Mar 2024, 10:40am
Forum: The Tea Shop
Topic: Are you "Infected by a remainer mind virus"?
Replies: 920
Views: 831570

Re: Are you "Infected by a remainer mind virus"?

al_yrpal wrote: 14 Mar 2024, 10:32am Unanswered...

How are EU commissioners chosen and put in charge?

Where is the EU HQ Brussels or Strasbourg?

How much were we paying the EU?

How much did the EU gravy train cost and what is it now Horizon is back?

Al
Continued deflection duly noted
by roubaixtuesday
13 Mar 2024, 7:58pm
Forum: The Tea Shop
Topic: Are you "Infected by a remainer mind virus"?
Replies: 920
Views: 831570

Re: Are you "Infected by a remainer mind virus"?

Jdsk wrote: 13 Mar 2024, 7:37pm
roubaixtuesday wrote: 13 Mar 2024, 12:17pm
Jdsk wrote: 13 Mar 2024, 10:52am "Brexit and the State":
https://ukandeu.ac.uk/wp-content/upload ... -State.pdf
"This report examines how the British state has changed as a result of Brexit. Leaving the EU has significantly altered the size and shape of the state, creating new tasks, functions and policies for it to manage. It has also altered its relationships with key stakeholders."
Overall, the number of civil servants has increased by around 100,000 since Brexit. That is not all attributable to Brexit – the responses to the Covid-19 pandemic and asylum claims have also driven numbers up – but most of the changes from 2016-2020 can be put down to Brexit, which was the major preoccupation of the government for that period.

Would be interested to hear from supporters of Brexit if 100,000 more civil servants was what they wanted.

Civil service has also increased proportion of employees in London. Again, was a relative increase in London spending what you wanted?

What a waste.
100,000. I knew that it was estimated in the Johnson era that 50,000 additional staff were planned for border controls alone.

My reference points for "How many is that?" include 25,000 for WTE GPs in the UK and 80,000 for Twickenham stadium and regulars in the British army. That gives some feel for the scale of how this *money could be better spent.

Jonathan

* Or taxpayers' money, according to taste.
Another reference point: the 100,000 increase in the UK is three times more than the entire total of Euro Eurocrats.
by roubaixtuesday
13 Mar 2024, 4:48pm
Forum: The Tea Shop
Topic: Are you "Infected by a remainer mind virus"?
Replies: 920
Views: 831570

Re: Are you "Infected by a remainer mind virus"?

al_yrpal wrote: 13 Mar 2024, 4:34pm How many UK staff were in Brussels?

How are EU commissioners chosen and put in charge?

Where is the EU HQ Brussels or Strasbourg?

How much were we paying the EU?

Al
Random unrelated questions, no answers, no surprise.

Meanwhile, the Brexit bureaucracy bonus is around +100,000, and the economic penalty about -5% of UK GDP, £130 billion, every year. That's actually quite comparable to the *total* EU budget.

Naturally, these facts, being the antithesis of what was promised, prove too uncomfortable to admit, so have to be deflected.
by roubaixtuesday
13 Mar 2024, 3:28pm
Forum: The Tea Shop
Topic: BEVs
Replies: 2120
Views: 108168

Re: BEVs

Jdsk wrote: 13 Mar 2024, 3:23pm
roubaixtuesday wrote: 13 Mar 2024, 3:08pm
...
Does anyone know how much more energy an electric vehicle uses with a battery capacity reduced to, say, 90% compared with when the battery was as new?
I don't understand the physics on this point; I *assume* it's not efficiency but purely capacity, purely because a drop in efficiency would result in the heat being dumped somewhere, and that would be a whopping temperature increase somewhere.

But I could be completely wrong, it's just speculation.
As always: efficiency has a lot of different meanings, and it's important to say which is being discussed. In this case is it the energy that an EV uses on the road or something about the whole cycle of charging and use?

Jonathan
Haha - yes, good point. In this case I meant battery efficiency (Energy output from batter)/(Energy input to battery). As the article quotes increased internal impedance, that imp[lies reduced efficiency.

I would guess (but don't know) that the only other reduction in range would result from increased air resistance due to higher density - that's about 5% extra air resistance from a 15 degree drop, so no more than 5% reduction in range.
by roubaixtuesday
13 Mar 2024, 3:11pm
Forum: The Tea Shop
Topic: BEVs
Replies: 2120
Views: 108168

Re: BEVs

From google scholar, it's both capacity and efficiency, and also accelerated degredation to boot.

Indeed, the effects of low temperature reduce the battery’s available energy and increase its internal impedance. In addition, performance-hampering cell degradation also occurs at low temperatures and throughout the entire life of a Li-ion battery.


But I can only access the summary

https://www.sciencedirect.com/science/a ... 1915014841
by roubaixtuesday
13 Mar 2024, 3:08pm
Forum: The Tea Shop
Topic: BEVs
Replies: 2120
Views: 108168

Re: BEVs

Biospace wrote: 13 Mar 2024, 2:59pm Asking manufacturers to give realistic economy figures has always been a problematic area, with testing regimes trying best to represent 'real world' conditions. The most relevant assessment is probably offered by long term tests in motoring magazines when a car has a several users and the operating conditions are clearly described.

Few are aware of the lengths to which manufacturers go to give the most favourable 'official' figure, but I've always found the published numbers pretty reliable. Too often people fit cheap tyres, use supermarket fuel and don't maintain their vehicle correctly, then complain the makers are trying to mislead.

A large plus point for EVs is their performance for short trips, with no warm up phase they are as efficient from 'cold' as 10 miles down the road. Less good is losing a third of range in cold weather, which has surprised many unused to relying on batteries.

Does anyone know how much more energy an electric vehicle uses with a battery capacity reduced to, say, 90% compared with when the battery was as new?
I don't understand the physics on this point; I *assume* it's not efficiency but purely capacity, purely because a drop in efficiency would result in the heat being dumped somewhere, and that would be a whopping temperature increase somewhere.

But I could be completely wrong, it's just speculation.