NVG - How do they work?
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NVG - How do they work?
Looking for some hints as to a document with diagrams that I can use for lesson. Have googled and only got ads for devices. AP 3456 has proved a fruitless search too. Thanks in advance.
HM
HM
PPatRoN
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Simply get two SMARTIES (TM) tubes, put some green cellophane over the ends and try doing close formation on a Ford Mondeo on the M1 whilst wearing them. You'll soon see how they work...
LJ
LJ
Of course, the important thing to remember is that they must have some light to work. They won't work on an overcast night out in the middle of the middle of nowhere without any cultural lighting.
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The most important thing to remember is that in perfect conditions the very best visual acuity you can get from a GEN 3 NVG is 20:200
What does that mean?
Well, you could claim a disability benefit for being "legally blind".....and you can never hold a drivers licence.
Of course its pefectly OK to fly around 'safely' at 25ft, 140kts at 0.2mLux, being shot at!
What does that mean?
Well, you could claim a disability benefit for being "legally blind".....and you can never hold a drivers licence.
Of course its pefectly OK to fly around 'safely' at 25ft, 140kts at 0.2mLux, being shot at!
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Huey
Try typing "night vision goggles theory -game" into Google. This will bring up a few sites that give the theory and avoid the reviews for games that involve NVG.
This will bring up sites like:
ATN Corporation
or
Physlink
Try typing "night vision goggles theory -game" into Google. This will bring up a few sites that give the theory and avoid the reviews for games that involve NVG.
This will bring up sites like:
ATN Corporation
or
Physlink
[quote]petitfromage
The most important thing to remember is that in perfect conditions the very best visual acuity you can get from a GEN 3 NVG is 20:200
What does that mean?
Well, you could claim a disability benefit for being "legally blind".....and you can never hold a drivers licence.
Of course its pefectly OK to fly around 'safely' at 25ft, 140kts at 0.2mLux, being shot at! [end quote]
Just do me a favour and remember to take your daylight filters off first or you WILL think you're blind...
I remeber a guy on Gr.7's who actually tried to attach his goggles the wrong way round (ala binos).Nice one FAQ!
The most important thing to remember is that in perfect conditions the very best visual acuity you can get from a GEN 3 NVG is 20:200
What does that mean?
Well, you could claim a disability benefit for being "legally blind".....and you can never hold a drivers licence.
Of course its pefectly OK to fly around 'safely' at 25ft, 140kts at 0.2mLux, being shot at! [end quote]
Just do me a favour and remember to take your daylight filters off first or you WILL think you're blind...
I remeber a guy on Gr.7's who actually tried to attach his goggles the wrong way round (ala binos).Nice one FAQ!
I'matightbastard
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That's like the story someone told me of where he bought some Foggles and just couldn't wait to play with them...
...so he put them on while he was driving his car to the airport.
(I'd believe it with him too)
...so he put them on while he was driving his car to the airport.
(I'd believe it with him too)
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Try this:
http://www.photonis.com/en/pdf_downl...0of%20IITs.PDF
The result of a search based on quite a few (un)happy days super gluing fingers to broken Anvis & Nite-Ops whilst waiting for the Swift to open…
http://www.photonis.com/en/pdf_downl...0of%20IITs.PDF
The result of a search based on quite a few (un)happy days super gluing fingers to broken Anvis & Nite-Ops whilst waiting for the Swift to open…
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The most important thing to remember is that in perfect conditions the very best visual acuity you can get from a GEN 3 NVG is 20:200
What does that mean?
, but at the risk of egg sucking - visual acuity is measured on a relative scale against average vision. Traditionally this distance is 20' (6m now that Imperial is a bad word). So 20/20 (6/6 = 20/20) means you can see at 20 feet what the average person sees at 20 feet. 20/200 means you can see at 20 feet what the average person sees at 200 feet & yes, you are legally blind!.
Of course its pefectly OK to fly around 'safely' at 25ft, 140kts at 0.2mLux, being shot at!
Short Blunt Shock
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My understanding (from CAM orientation cse) is that the best one could expect (on average) was 6/18, which whilst not quite 'legally' blind, would be illegal for driving in the UK! Still, good enough for what we need them for at night, as long as you stay well away from pylons! on nights with good mlux levels, I have been able to see right into some houses with poorly lit rooms when flying slowly (on appch and DZs) - now THATS spooky!
16B
16B
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For Mighty Gem
'Of course, the important thing to remember is that they must have some light to work. They won't work on an overcast night out in the middle of the middle of nowhere without any cultural lighting.'
I would have to disagree old chum. Have had plenty of nights over the last 15 years with overcast in the middle of nowhere without any cultural lighting (whatever that is, must be something that occurs in old blighty that us colonials can only dream about), in formation at 50' landing in dusty pads when the gogs worked just fine. Then again most of the time I had my eyes closed and just hoped for the best.
Cheers Sikhorsey.
'Of course, the important thing to remember is that they must have some light to work. They won't work on an overcast night out in the middle of the middle of nowhere without any cultural lighting.'
I would have to disagree old chum. Have had plenty of nights over the last 15 years with overcast in the middle of nowhere without any cultural lighting (whatever that is, must be something that occurs in old blighty that us colonials can only dream about), in formation at 50' landing in dusty pads when the gogs worked just fine. Then again most of the time I had my eyes closed and just hoped for the best.
Cheers Sikhorsey.
PPatRoN
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Cultural lighting = light from towns, villages, farms, roads, refineries, car importers' compounds (Lincolnshire at night!), and so on, reflecting down from the cloudbase. I've heard it called 'cityglow' (not quite right for Lincolnshire at night).
adr
adr