Astonishing Facts....
Discussion
FWIW the perforated satellite dishes make very little difference to wind resistance (especially at high wind speeds) since the holes are too small on dishes designed for the ku band. Its for cosmetic reasons mainly, because they pass light through they blend better into the surface they are mounted on compared to solid.
Mr2Mike said:
FWIW the perforated satellite dishes make very little difference to wind resistance (especially at high wind speeds) since the holes are too small on dishes designed for the ku band. Its for cosmetic reasons mainly, because they pass light through they blend better into the surface they are mounted on compared to solid.
I would disagree as it doesn't exactly make them difficult to spot, not even vaguely does it succeed. It's a combination of things including wind resistance, but also weight and money saving.227bhp said:
I would disagree as it doesn't exactly make them difficult to spot, not even vaguely does it succeed. It's a combination of things including wind resistance, but also weight and money saving.
I didn't say it camouflaged them, they just look a little less garish. Wind resistance is a non starter, in fact a perforated dish is likely to get damaged before a solid one in high winds. The (very) old mesh dishes had low wind resistance, but they are for C band and they were a bit lossy anyway.I always though perogative was spelt like this but apparently ... https://brians.wsu.edu/2016/05/30/perogative-prero...
Frimley111R said:
I always though perogative was spelt like this but apparently ... https://brians.wsu.edu/2016/05/30/perogative-prero...
Your prerogative but it's dangerously close to perjorative . Just saying. Frimley111R said:
I always though perogative was spelt like this but apparently ... https://brians.wsu.edu/2016/05/30/perogative-prero...
Me too. That makes me guilty of almost the same crime as people who think "would've" is a contraction of "would of".Mr2Mike said:
227bhp said:
I would disagree as it doesn't exactly make them difficult to spot, not even vaguely does it succeed. It's a combination of things including wind resistance, but also weight and money saving.
I didn't say it camouflaged them, they just look a little less garish. Wind resistance is a non starter, in fact a perforated dish is likely to get damaged before a solid one in high winds. The (very) old mesh dishes had low wind resistance, but they are for C band and they were a bit lossy anyway.Frimley111R said:
I always though perogative was spelt like this but apparently ... https://brians.wsu.edu/2016/05/30/perogative-prero...
I lost a £10 bet back in 1987 on this spelling. Still annoyed at my ignorance to this day.Frimley111R said:
I always though perogative was spelt like this but apparently ... https://brians.wsu.edu/2016/05/30/perogative-prero...
Well I will go to the foot of my stairs! Unbelievable.GOG440 said:
Frimley111R said:
Mr2Mike said:
I dont recall giving that information, though they did ask about any eye injuries that may have left metal inside the eye...
Me neither, the only thing they have to consider is if the patient is too fat to go into one as they are very tight for space inside.There are weight limits for the scanners but we tend to run out of space well before the limit.
The reason we ask about metal in your eyes is that unlike most other bits of your body your eyes dont develop the scar tissue that would hold the metal fragment in place, you really dont want a piece of metal ricocheting around your eyeball at 40mph
227bhp said:
I'm finding it hard to understand how something which has (say) 40% of its surface area missing isn't significantly effected by the wind hitting it.
1) It's nowhere near 40%, much lower.2) The holes are too small to flow any appreciable amount of air, even though there are many of them.
The dishes made from mesh do have much lower wind loading. However these only work at the low frequency band (C band) as the hole size is much larger, and even then they don't work very well compared to a solid dish.
Edited by Mr2Mike on Thursday 14th June 09:53
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