Driving off birds using acft radar
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Apparently but here is my contribution:
Sweep Patterns
The sweep pattern is different in approach and takeoff modes. The system al- ternates between WXR and PWS sweeps.
- PWS and WXR Sweep Pattern in Takeoff Mode ;
Position Dir Radar Sweep Paint Sweep Angle (Degrees) Time
Sweep1 L-R Both WXR data update Both WXR +icons painted -90 to +90 4
Sweep 2 R-L Both PWS data updated Both PWS icons painted +90 to -60 3
Sweep 3 L-R Both PWS data updated Both PWS icons painted -60 to +60 2
Sweep 4 R-L Both PWS data updated Both PWS icons updated +60 to -90 3
- PWS and WXR Sweep Pattern in Approach Mode ;
Position Dir Radar Sweep Paint Sweep Angle (Degrees) Time
Sweep 1 L-R Both WXR data update Both WXR +icons painted -60 to +90 4
Sweep 2 R-L Both PWS data updated Both PWS icons painted +90 to -90 4
Sweep 3 L-R Both PWS data updated Both PWS icons painted -90 to +90 4
Sweep 4 R-L Both PWS data updated Both PWS icons updated +90 to -90 4
- PWS Sweep Pattern ;
Position Dir Radar Sweep Paint Sweep Angle (Degrees) Time
Sweep 1 L-R Both WXR data update Both WXR +icons painted -60 to +60 4
Sweep 2 R-L Both PWSs data updated Both PWS icons painted +60 to -60 3
Sweep 3 L-R Both PWSs data updated Both PWS icons painted -60 to +60 2
Sweep 4 R-L Both PWSs data updated Both PWS icons updated +60 to -60 3
The weather data is updated every fourth sweep.
Every 4 sweeps,meaning 12 secs...
B737-600/700/8007/900 34-43
Sweep Patterns
The sweep pattern is different in approach and takeoff modes. The system al- ternates between WXR and PWS sweeps.
- PWS and WXR Sweep Pattern in Takeoff Mode ;
Position Dir Radar Sweep Paint Sweep Angle (Degrees) Time
Sweep1 L-R Both WXR data update Both WXR +icons painted -90 to +90 4
Sweep 2 R-L Both PWS data updated Both PWS icons painted +90 to -60 3
Sweep 3 L-R Both PWS data updated Both PWS icons painted -60 to +60 2
Sweep 4 R-L Both PWS data updated Both PWS icons updated +60 to -90 3
- PWS and WXR Sweep Pattern in Approach Mode ;
Position Dir Radar Sweep Paint Sweep Angle (Degrees) Time
Sweep 1 L-R Both WXR data update Both WXR +icons painted -60 to +90 4
Sweep 2 R-L Both PWS data updated Both PWS icons painted +90 to -90 4
Sweep 3 L-R Both PWS data updated Both PWS icons painted -90 to +90 4
Sweep 4 R-L Both PWS data updated Both PWS icons updated +90 to -90 4
- PWS Sweep Pattern ;
Position Dir Radar Sweep Paint Sweep Angle (Degrees) Time
Sweep 1 L-R Both WXR data update Both WXR +icons painted -60 to +60 4
Sweep 2 R-L Both PWSs data updated Both PWS icons painted +60 to -60 3
Sweep 3 L-R Both PWSs data updated Both PWS icons painted -60 to +60 2
Sweep 4 R-L Both PWSs data updated Both PWS icons updated +60 to -60 3
The weather data is updated every fourth sweep.
Every 4 sweeps,meaning 12 secs...
B737-600/700/8007/900 34-43
Last edited by de facto; 20th Oct 2013 at 01:35.
Damage Chart
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Took you a week to organise this cut 'n paste story.
Can you find it also for the Honeywell RDR4000? It's slightly different.
Can you find it also for the Honeywell RDR4000? It's slightly different.
I wish you well.
Last edited by de facto; 20th Oct 2013 at 10:36.
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Someone asked a few pages back, hands up if radar can predict CAT. My hand is down.
Just because we don't understand something doesn't mean it don't work for one reason or another. Someone mentioned birds were stupid. Really? Then how the can they navigate over thousands of miles and find their way home. Pigeons and migrating species. We humans are the turkeys.
If someone explains and proves how birds navigate, then and only then, when they tell me radar don't repel birds I will believe them. Until then I have an open mind.
Just because we don't understand something doesn't mean it don't work for one reason or another. Someone mentioned birds were stupid. Really? Then how the
can they navigate over thousands of miles and find their way home. Pigeons and migrating species. We humans are the turkeys.If someone explains and proves how birds navigate, then and only then, when they tell me radar don't repel birds I will believe them. Until then I have an open mind.
Last edited by Sop_Monkey; 20th Oct 2013 at 17:47.
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Well, somebody above asked for 'facts' so did a bit of searching of bio journals. Basically found little relevant information, suggesting that it has not been well studied. However the article below does have two interesting points.
1) they found no evidence of radar on birds
2) they note that others have found evidence
Behaviour of migrating birds exposed to X-band radar and a bright light beam
I read the article and has some good references to follow up if anyone is interested.
So, it seems an open question still.
Some thoughts:
1) power is not an issue - a battery powered laser can do more eye damage than a 60 watt bulb
2) it may have something to do with the bird species and radar frequency mix
3) nothing is ever absolute - single cases are basically irrelevant to making a broad conclusion
I suspect some birds may be able to sense it in some situations, it is just that we o not know what ones in what situations, nor do we know what behavior such a sensation would induce.
About the people who could sense it, this seems reasonable and reminds me of how some people can sense polarized light even though most can not. (e.g. Haidinger's brush - Wikipedia, the free encyclopedia)
1) they found no evidence of radar on birds
2) they note that others have found evidence
Behaviour of migrating birds exposed to X-band radar and a bright light beam
I read the article and has some good references to follow up if anyone is interested.
So, it seems an open question still.
Some thoughts:
1) power is not an issue - a battery powered laser can do more eye damage than a 60 watt bulb
2) it may have something to do with the bird species and radar frequency mix
3) nothing is ever absolute - single cases are basically irrelevant to making a broad conclusion
I suspect some birds may be able to sense it in some situations, it is just that we o not know what ones in what situations, nor do we know what behavior such a sensation would induce.
About the people who could sense it, this seems reasonable and reminds me of how some people can sense polarized light even though most can not. (e.g. Haidinger's brush - Wikipedia, the free encyclopedia)
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May I suggest going to the Transport Canada website Transport Canada / Transports Canada and look for the book Sharing the Skies. You can download the PDF files and read them. The book clearly states that based on numerous inquiries with leading biologists in the field of bird strikes, along with research of peer reviewed papers that ther is NO evidence that aircraft radar is detected or understood as a threat by birds.
This remains one of the biggest urban myths in aviation along with the thoughts that birds cannot be effectively managed for substantial risk reduction.
I suggest reading the book will give you a better understanding of the problem and what can be done.
This remains one of the biggest urban myths in aviation along with the thoughts that birds cannot be effectively managed for substantial risk reduction.
I suggest reading the book will give you a better understanding of the problem and what can be done.
Last edited by Canuckbirdstrike; 20th Oct 2013 at 22:38.
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Over 600 approaches and departures from Tegucigalpa Honduras never turned the radar on with thousands of turkey buzzards in the valley. We always visually avoided them with no problem. Radar does nothing. Visually you can avoid them if you look far enough ahead. If you see them at the last few seconds you probably can't avoid them. We had no problem just looking out the window and maneuvering around them when they were dots, not right in front of you. It worked fine for us but I know some pilots will say you can not avoid a bird strike. You have to look way ahead of your flight path and it is quite easy.
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Really? Then how the can they navigate over thousands of miles and find their way home
Unless you can show me that birds have some sort of directional sensing facility (like an eye, but for radar) that will tell them from where the threat direction is coming, so they can indeed avoid the aircraft, I think it is highly improbable that radar has any effect whatsoever. What I'm trying to say is, it's bollocks. Turn on your radar on the ground - see what the birds do? Oh yeah, nothing.
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Gkk -
A damage chart shows all the existing minor dents and dings that an individual aircraft suffers during its time in service. These areas of minor damage will have been assessed and noted by maintenance so that a record can be kept.
I have also seen such damage marked on the aircraft itself.
A damage chart shows all the existing minor dents and dings that an individual aircraft suffers during its time in service. These areas of minor damage will have been assessed and noted by maintenance so that a record can be kept.
I have also seen such damage marked on the aircraft itself.
