caernarfon and wind turbines
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Suggest you read below......scroll down to technical details
Aeolus Power (Wind-Energy) : Questions and answers
Aeolus Power (Wind-Energy) : Questions and answers
but as I say I've never seen one. I've seen a lot of turbines.
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There are also the Proven turbine which have the rotor downwind and the gearbox into wind.
We have one a few fields away from us.
I might add, I do find the big turbines at Whitelee (each is higher than the Blackpool Tower!) a good indicator of upper wind direction and of general wind direction on a flickery day, since they turn into wind slower than the windsock does
We have one a few fields away from us.
I might add, I do find the big turbines at Whitelee (each is higher than the Blackpool Tower!) a good indicator of upper wind direction and of general wind direction on a flickery day, since they turn into wind slower than the windsock does
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from the CAA doc;
Turbulence
8.1 Turbulence is caused by the wake of the turbine which extends stream wise behind
the blades and the tower, from a near to a far field. The dissipation of the wake
intensity depends on the convection, the turbulence diffusion and the topology
(obstacles, terrain etc.).
8.2 There is evidence of considerable research activity on modelling and studying the
wake characteristics within wind developments, using computational fluid dynamics
techniques, wind tunnel tests and on site lidar measurements. A thorough literature
survey would be necessary to establish the scale and the advances of the research
findings.
8.3 It is recognised that aircraft wake vortices can be hazardous to other aircraft, and that
wind turbines produce wakes of similar, but not identical, characteristics to aircraft.
Although there are independent bodies of knowledge for both of the above, currently,
there is no known method of linking the two. Published research shows
measurements at 16 rotor diameters downstream of the wind turbine indicating that
turbulence effects are still noticeable1. Measurement work has been focused on the
near wake due to technical challenges of the experimental set up, while modelling
studies are capable of examining the wake turbulence further downstream2 3.
Although models can be used to study the effects of the far wake, verification and
validation processes of these models are still ongoing4.
8.4 There are currently no Mandatory Occurrence Reports (MOR)5 or aircraft accident
reports related to wind turbines in the UK. However, the CAA has received anecdotal
reports of aircraft encounters with wind turbine wakes representing a wide variety of
views as to the significance of the turbulence. Although research on wind turbine
wakes has been carried out, the effects of these wakes on aircraft are not yet known.
Furthermore, the CAA is not aware of any formal flight trials to investigate wake
effects behind operating wind turbines. In the UK wind turbines are being proposed
and built close to aerodromes (both licensed and unlicensed), including some
developments on aerodrome sites, indicating an urgent need to assess the potential
impact of turbulence on aircraft and in particular, to light aircraft and helicopters.
Interesting and the photo of turbine in fog.
What galls me is that we shortly have to impliment a safety management scheme (sms) into an ATO from an RF soon.
For what purpose. So that unsafe situations or practises can be highlighted or cured. Does the CAA not run a sms.
Then something like this is approved and appears on a airfield.
So i can sign a disclaimer.
Rather not risk my neck.
Turbulence
8.1 Turbulence is caused by the wake of the turbine which extends stream wise behind
the blades and the tower, from a near to a far field. The dissipation of the wake
intensity depends on the convection, the turbulence diffusion and the topology
(obstacles, terrain etc.).
8.2 There is evidence of considerable research activity on modelling and studying the
wake characteristics within wind developments, using computational fluid dynamics
techniques, wind tunnel tests and on site lidar measurements. A thorough literature
survey would be necessary to establish the scale and the advances of the research
findings.
8.3 It is recognised that aircraft wake vortices can be hazardous to other aircraft, and that
wind turbines produce wakes of similar, but not identical, characteristics to aircraft.
Although there are independent bodies of knowledge for both of the above, currently,
there is no known method of linking the two. Published research shows
measurements at 16 rotor diameters downstream of the wind turbine indicating that
turbulence effects are still noticeable1. Measurement work has been focused on the
near wake due to technical challenges of the experimental set up, while modelling
studies are capable of examining the wake turbulence further downstream2 3.
Although models can be used to study the effects of the far wake, verification and
validation processes of these models are still ongoing4.
8.4 There are currently no Mandatory Occurrence Reports (MOR)5 or aircraft accident
reports related to wind turbines in the UK. However, the CAA has received anecdotal
reports of aircraft encounters with wind turbine wakes representing a wide variety of
views as to the significance of the turbulence. Although research on wind turbine
wakes has been carried out, the effects of these wakes on aircraft are not yet known.
Furthermore, the CAA is not aware of any formal flight trials to investigate wake
effects behind operating wind turbines. In the UK wind turbines are being proposed
and built close to aerodromes (both licensed and unlicensed), including some
developments on aerodrome sites, indicating an urgent need to assess the potential
impact of turbulence on aircraft and in particular, to light aircraft and helicopters.
Interesting and the photo of turbine in fog.
What galls me is that we shortly have to impliment a safety management scheme (sms) into an ATO from an RF soon.
For what purpose. So that unsafe situations or practises can be highlighted or cured. Does the CAA not run a sms.
Then something like this is approved and appears on a airfield.
So i can sign a disclaimer.
Rather not risk my neck.
Last edited by BigEndBob; 22nd Jul 2013 at 07:29.
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I flew into Caernarfon over the weekend and with them using rw25 I had no problem with the wind turbines whatsoever. I did take note of them just in case I had to go around (still no problem on 25).
I did think they would cause more of a concern or at the very least a distraction if I had an engine failure or had to complete bad weather / low level circuit when taking off but that was about it.
I landed without fuss, parked up and went down to the beach. On walking down you pass the start of rw02. If I was using 02 then I would be more than concerned about the proximity of the turbines to the runway, in normal conditions am sure it is fine but in any sort of emergency then they are definitely an extra burden in an already stressful situation.
On 02 there is little margin for error as well, take a cross wind left to right, pilot handling errors where you allow the aircraft to drift and things have the potential to go wrong. In the case 02 you would probably be more aware of the fact the turbines are there and initiate a slight turn to the left after take off, just to be sure.
I did leave thinking WHY put them there? But I suppose they have their reasons ££££
I did think they would cause more of a concern or at the very least a distraction if I had an engine failure or had to complete bad weather / low level circuit when taking off but that was about it.
I landed without fuss, parked up and went down to the beach. On walking down you pass the start of rw02. If I was using 02 then I would be more than concerned about the proximity of the turbines to the runway, in normal conditions am sure it is fine but in any sort of emergency then they are definitely an extra burden in an already stressful situation.
On 02 there is little margin for error as well, take a cross wind left to right, pilot handling errors where you allow the aircraft to drift and things have the potential to go wrong. In the case 02 you would probably be more aware of the fact the turbines are there and initiate a slight turn to the left after take off, just to be sure.
I did leave thinking WHY put them there? But I suppose they have their reasons ££££
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Flew into Caernarfon yesterday as planned, approaching from the south (Haverfordwest) and with 07 active, the turbines were facing inland (approximately NE) and turning. I did get a bit of turbulence on final but as this was over the sea/beach and I was in a C150 it may not be attributable to the turbines.
