Things you always wanted to know the answer to [Vol. 3]
Discussion
Asterix said:
Nom de ploom said:
potentially stupid question but why are wind turbine blades vertical instead of horizontal?
they would be less of an eyesore perhaps? I realise that there might be a large amount of lift generated like helicopter blades but if so can they be switched round so the lift is upwards?
most of then need a motor to start them anyway...is it a question of efficient aero dynamic wind capturing that means they have to be vertical?
just a thought the other day when we were passing a load of them in north yorkshire....
Errr.... wind blows across stuff and not down or up. I have a sneaking suspicion that might be why.they would be less of an eyesore perhaps? I realise that there might be a large amount of lift generated like helicopter blades but if so can they be switched round so the lift is upwards?
most of then need a motor to start them anyway...is it a question of efficient aero dynamic wind capturing that means they have to be vertical?
just a thought the other day when we were passing a load of them in north yorkshire....
I think he might be talking about pelton type turbine (cupped vanes) which has had some consideration http://cleantechnica.com/2009/01/27/the-impossible...
However:
They are less efficient than blade designs (turbulence from preceding blade)
Have lower swept area (area the blade covers to take advantage of the flow)
Wind speed increases with height.
There is less turbulence at height
So these are the reasons you have tall turbines with a large swept areas.
Dr Jekyll said:
Has there ever been a joke in Star Trek? Including TNG, Voyager etc. I don't mean 'A Klingon walked into a bar.........' I just mean something intentionally funny or a good one liner as you get occasionally in James Bond or Blakes 7.
Surely the bit in the one with the Tribbles where they reveal they've beamed them over to someone else's ship and then add "where they'll be no tribble at all" counts? Hold your sides, everyone.droopsnoot said:
Dr Jekyll said:
Has there ever been a joke in Star Trek? Including TNG, Voyager etc. I don't mean 'A Klingon walked into a bar.........' I just mean something intentionally funny or a good one liner as you get occasionally in James Bond or Blakes 7.
Surely the bit in the one with the Tribbles where they reveal they've beamed them over to someone else's ship and then add "where they'll be no tribble at all" counts? Hold your sides, everyone.https://youtu.be/-GL25SaeOBg?t=39
Willy Nilly said:
I think it was Badmington Hoss Trials recently and as we all know women with hosses are really mental, so what would happen if at said event a man said something out of turn?
I think everyone would wonder wtf you're on about and probably think you're a tad misogynistic 
On the Startrek thing, I'm sure Spock was always delivering dry one liners and Datum and his friend with the laser eyes had an "interplay" riffing off the robot being naive.
My question: why do spellchecks lack really obvious words like riffing and spellchecks and tad?
scarble said:
< snip >
My question: why do spellchecks lack really obvious words like riffing and spellchecks and tad?
Perhaps because you are using an "American English" one and 'riffing' is an old word, used nowadays with a new, slang meaning. 'Spellchecks' is not a word. 'Spellchecker' has become one, though. Perhaps this is what you mean?My question: why do spellchecks lack really obvious words like riffing and spellchecks and tad?
'Tad' is English and American, though? No idea about that one being rejected!
Hope This Helps!
Spellchecks should be a word 
Using the Firefox British English 1.19.1 dictionary and I'm not sure how "new" this usage of riffing is either, nor how old a word it is, unless you are referring to a new slang meaning I am unaware of?
Powertrain/drivetrain is another one, yes it really is written as one word.
Using the Firefox British English 1.19.1 dictionary and I'm not sure how "new" this usage of riffing is either, nor how old a word it is, unless you are referring to a new slang meaning I am unaware of?
Powertrain/drivetrain is another one, yes it really is written as one word.
Brother D said:
Asterix said:
Nom de ploom said:
potentially stupid question but why are wind turbine blades vertical instead of horizontal?
they would be less of an eyesore perhaps? I realise that there might be a large amount of lift generated like helicopter blades but if so can they be switched round so the lift is upwards?
most of then need a motor to start them anyway...is it a question of efficient aero dynamic wind capturing that means they have to be vertical?
just a thought the other day when we were passing a load of them in north yorkshire....
Errr.... wind blows across stuff and not down or up. I have a sneaking suspicion that might be why.they would be less of an eyesore perhaps? I realise that there might be a large amount of lift generated like helicopter blades but if so can they be switched round so the lift is upwards?
most of then need a motor to start them anyway...is it a question of efficient aero dynamic wind capturing that means they have to be vertical?
just a thought the other day when we were passing a load of them in north yorkshire....
I think he might be talking about pelton type turbine (cupped vanes) which has had some consideration http://cleantechnica.com/2009/01/27/the-impossible...
However:
They are less efficient than blade designs (turbulence from preceding blade)
Have lower swept area (area the blade covers to take advantage of the flow)
Wind speed increases with height.
There is less turbulence at height
So these are the reasons you have tall turbines with a large swept areas.
You can see quite a few of them around, such as powering the B&Q that you can see from the A3 as you come into London (or indeed leave London for that matter). The downsides are as described above. However there are benefits such as:
- Less noise / vibration at ground level
- Simpler to manufacture
- Catches the wind in all directions i.e. it doesn't have to turn to face the wind, so good in gusty urban environments
Snubs said:
Brother D said:
Asterix said:
Nom de ploom said:
potentially stupid question but why are wind turbine blades vertical instead of horizontal?
they would be less of an eyesore perhaps? I realise that there might be a large amount of lift generated like helicopter blades but if so can they be switched round so the lift is upwards?
most of then need a motor to start them anyway...is it a question of efficient aero dynamic wind capturing that means they have to be vertical?
just a thought the other day when we were passing a load of them in north yorkshire....
Errr.... wind blows across stuff and not down or up. I have a sneaking suspicion that might be why.they would be less of an eyesore perhaps? I realise that there might be a large amount of lift generated like helicopter blades but if so can they be switched round so the lift is upwards?
most of then need a motor to start them anyway...is it a question of efficient aero dynamic wind capturing that means they have to be vertical?
just a thought the other day when we were passing a load of them in north yorkshire....
I think he might be talking about pelton type turbine (cupped vanes) which has had some consideration http://cleantechnica.com/2009/01/27/the-impossible...
However:
They are less efficient than blade designs (turbulence from preceding blade)
Have lower swept area (area the blade covers to take advantage of the flow)
Wind speed increases with height.
There is less turbulence at height
So these are the reasons you have tall turbines with a large swept areas.
You can see quite a few of them around, such as powering the B&Q that you can see from the A3 as you come into London (or indeed leave London for that matter). The downsides are as described above. However there are benefits such as:
- Less noise / vibration at ground level
- Simpler to manufacture
- Catches the wind in all directions i.e. it doesn't have to turn to face the wind, so good in gusty urban environments
However, due to limitations on getting it stable - due to the large revolving parts - there is a limit on usable size and energy generating potential. Hence why we have the massive bladed jobbies on immense poles.
Why does the UK continue with 'cats-eyes' on roadways when decent paint is better?
marshalla said:
Evoluzione said:
If I am sat in a car with engine off listening to the radio and then start the car, why does the radio go off and then back on again?
Non-essential circuits are disconnected so that more power is available from the battery to turn the engine over.There are unloader relays, or similar electronic parts that divert all non essential power to the starter
Headlights tend to stay on these days, but the radio will shut off for a second. It's a good way to tell if you have an immobiliser issue. If the radio stays on, the car isn't even trying to start, if it switches off, it is making an attempt.
Headlights tend to stay on these days, but the radio will shut off for a second. It's a good way to tell if you have an immobiliser issue. If the radio stays on, the car isn't even trying to start, if it switches off, it is making an attempt.
Drug addicts, especially those living on run-down housing estates- where do they get the money to buy drugs with? If they are stealing it, who from and how, and why haven't the people they are stealing from run out of money/stuff? If it's prostitution, where are they getting the clients from, and how do the really ugly ones get clients?
RobinOakapple said:
Drug addicts, especially those living on run-down housing estates- where do they get the money to buy drugs with? If they are stealing it, who from and how, and why haven't the people they are stealing from run out of money/stuff? If it's prostitution, where are they getting the clients from, and how do the really ugly ones get clients?
They steal stuff from people who have nice stuff, and then flog it to the first buyer. People who have nice stuff tend to have it insured, so the nice stuff gets replaced - and then nicked again (frequently) so you could argue that the insurance business is paying for the drugs 
As for the prostitution - there's a market for everything.
marshalla said:
RobinOakapple said:
Drug addicts, especially those living on run-down housing estates- where do they get the money to buy drugs with? If they are stealing it, who from and how, and why haven't the people they are stealing from run out of money/stuff? If it's prostitution, where are they getting the clients from, and how do the really ugly ones get clients?
They steal stuff from people who have nice stuff, and then flog it to the first buyer. People who have nice stuff tend to have it insured, so the nice stuff gets replaced - and then nicked again (frequently) so you could argue that the insurance business is paying for the drugs As for the prostitution - there's a market for everything.
Gassing Station | The Lounge | Top of Page | What's New | My Stuff