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I like the idea of the third rail at ground level it's aesthetically more pleasing than gantries . But why does it need to be constantly energised ? Only small sections need to be say 0.5 mile to 1 mile segments. Similarly the underground should have the section close to the station deenergised...

I had a funny event a year ago. I was grass cutting with an 1.6kw electric mower, which had a dodgy extension lead. At some stage, the wire broke within the insulation and went open circuit. It must have happened at peak current in the phase. The back EMF was such as to blow apart the...

We tend to do more of the things we like.. so ebiking will get people out and about, even if it's only 50watt of effort, it's still more than sitting at home and raiding the biscuit tin while watching TV. For my case, it's the views and the fresh air and the prospect of a coffee after 30km...

You are correct .. I was away from my base when I posted.

Things that degrade battery capacity are . High temperature ,swings from full to empty. Charging and discharging at high rates are only important in that they raise the temperature because it's an inefficient method of converting the charge state of the chemical. Remember that most...

.. I would not have expected to say it but congrats to the dup

The live rail ... probably 1million amps it is a very thick cross section and would take a while to heat up to plastic point. The train is probably drawing 100kw when accelerating. That's a guess . So typically the current will be 100kA÷500 =200amp. If it's more power them the current will be...

I agree with flecc Speed matters. A bike and cyclist travelling at 20mph has four times the kinetic energy of one at 10mph and 16 times the kinetic energy of a fast walking speed of 5mph. Also reaction times are limited and at speed actions need to be taken faster. One of the...

While D8vh, is technically correct in that a dynamo , being driven by a motor is inherently less efficient than any direct electrical connection, I think he is missing the point. A dynamo is very much a set and forget product. With LED bulbs, they wont blow or wear out . Moreover were the...

Just a random thought.. the wanton and furious driving law seems to be all embracing. If you have a defective or illegal contraption, and you cause an injury to another person, whether on a public road or private land, then you are liable for prosecution. .. that should concern anybody in the...

.. by "it" did you mean economics or was it something more personal?

I don't need reminding who one of our TDs is. I am fully aware of it. The advantage of a multiseat constitutity is that there are alternative voices .

I would agree, however every so often Tommie introduces the topic in one guise or another and it needs to be countered. As long as he does not introduce these topics, I will not respond.

.. are we into the seven dwarfs now? .. and they stored 100kb per side.. . We had a few of the drives around my college and you could use them for demonstration to an entire class. It was easy to show the evolution down to 5.25 , and then to the smaller minidisk.

As I have said on a few occasions, I am no fan of Mr Adams and have never ever voted for him or his party. Can't say fairer than that!

.. maybe you should rethink the crossbar... Stepthrough bikes are much more gentle on the joints. If comfort is a priority, one of the Dutch style bikes wins every time , and they normally come with mudguards and lights and carrier. There are plenty of brands out there

Indeed, including invading neighbouring sovereign countries with masses of troops , as Mr Robinson did in one occasion.

Zatlan, I have sympathy for your viewpoint but the problem is who polices it.. who polices the police . If there were a news standards body, who would be on it? . The courts allow for defamation and loss of privacy etc , but even these remedies are of limited value because once the news is...

That's a lot of hate to go around!

I have the same vintage um24 , so it probably has the same type of control. . If it has a display containing a few red LEDs , to denote battery power on the right hand side of the handlebars , then this is also potentially a throttle. It may have been disabled in order to comply with an...