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Why Black Nose  
User currently offlineFaroeFlyer From Faroe Islands, joined Aug 2005, 87 posts, RR: 0
Posted (8 years 11 months 2 weeks 4 days 6 hours ago) and read 3536 times:

How come many airliners used to have black noses? Fashion of the day or any practical use?


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When I was really young I thought it was a rubber, so that the aircraft would bounce  bouncy  if it crashed. Had no logical sense at all  dopey 


Cast your dancing spell my way...
19 replies: All unread, jump to last
 
User currently offlineB777200 From Zambia, joined Aug 2005, 30 posts, RR: 3
Reply 1, posted (8 years 11 months 2 weeks 4 days 6 hours ago) and read 3510 times:

I asked this same question earlier today, 17th September, 2005, in the Airliners.Net chat room. I was told it was to reduce glare effects for the Pilots.

User currently offlineFaroeFlyer From Faroe Islands, joined Aug 2005, 87 posts, RR: 0
Reply 2, posted (8 years 11 months 2 weeks 4 days 5 hours ago) and read 3485 times:

Any idea why it was discontinued?


Cast your dancing spell my way...
User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 3, posted (8 years 11 months 2 weeks 4 days 5 hours ago) and read 3442 times:

Isn't it a paint that does not reflect the Weather radar Echos.Earlier it was available only in black.
However nowadays various colours are available.Also a Rubber cap
Nicknamed the Condom is placed over the Radome tip to prevent damage caused by the Airflow over its surface.
regds
MEL



Think of the brighter side!
User currently offlineSATL382G From , joined Dec 1969, posts, RR:
Reply 4, posted (8 years 11 months 2 weeks 4 days 5 hours ago) and read 3440 times:

The material the old radomes were made out of was black. If the airline paints the very tip of the radome black, then it won't have to repaint so often because the chips won't show.....

Radome materials now are typically grey.....


User currently offlineTbanger From Australia, joined Jul 2004, 266 posts, RR: 0
Reply 5, posted (8 years 11 months 2 weeks 3 days 23 hours ago) and read 3289 times:

Different paints alone do not affect RADAR returns or interference. Metal however does. This is why radomes are made from composite materials.

Now we have all sorts of errosion problems hence the rubber protectors mentioned above.

One problem we do have with composite materials though is the inability to conduct electricity. Lightning or electricity will ALWAYS finding the quickest route to earth. In most cases that quickest way through a radome is to the radar antenna located only inches behind the radome.

To prevent this, they install bonding leads inside the radome to allow the lightning to pass through the radome and into the metal fuselage section, then hopefully it passes out through the static wicks...(doesn't alwasy work though).

For these bonding leads to work effectively, we need to coat the composite radome with a conductive paint. Namely this is a black paint which also has errosion resistant properties to it. This special paint does NOT affect radar returns. (Costs about $500USD for a 1.25 gallon kit)

Now why did they leave them black you ask? Simply because paints weren't the standard 20 years ago that they are today. Imagine a white aircraft with a black undercoat so to speak. When the top coat errodes away from rain etc, it will look quite messy.

Paints nowadays are like armour plating, so to speak and hence offer greater rain errosion properties then their older counterparts. Paint covered with a 'condom' is the best measure to protect the radome.

One other problem that you can find is depending on the aircrafts logo, radomes often get removed from one aircraft, repaired and then installed onto another aircraft. Sometimes cheat lines and even the top coat colours don't always match up. Leaving them black was a simple solution.


User currently offlineZSOFN From United Kingdom, joined Jun 2005, 1413 posts, RR: 6
Reply 6, posted (8 years 11 months 2 weeks 3 days 20 hours ago) and read 3164 times:

This was discussed further in the Tech/Ops forum recently:

BA 737 & 757 Black Nose Bands (by Hals Sep 11 2005 in Tech Ops)


User currently offlineDLKAPA From , joined Dec 1969, posts, RR:
Reply 7, posted (8 years 11 months 2 weeks 3 days 20 hours ago) and read 3159 times:

Quoting Tbanger (Reply 5):
Paints nowadays are like armour plating, so to speak and hence offer greater rain errosion properties then their older counterparts. Paint covered with a 'condom' is the best measure to protect the radome.

Slightly off topic but isn't paint statically charged now to attract itself to and bond easier with the fuselage when coming out of the gun and drying onto the plane?


User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 8, posted (8 years 11 months 2 weeks 3 days 8 hours ago) and read 2993 times:

Quoting Tbanger (Reply 5):
Different paints alone do not affect RADAR returns or interference



Quoting Tbanger (Reply 5):
This special paint does NOT affect radar returns.

Earlier it was Available in Black only.The Other Colours were not Available then.
regds
MEL



Think of the brighter side!
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 9, posted (8 years 11 months 2 weeks 3 days 7 hours ago) and read 2979 times:

Quoting FaroeFlyer (Reply 2):
Any idea why it was discontinued?

It hasn't really been discontinued. Newer paint technology has allowed paint manufactures to produce a 'matt' finish in the same color as the primary color. If you look closely you will see the 'new' glareshield paint.



"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineSpencer From United Kingdom, joined Apr 2004, 1635 posts, RR: 17
Reply 10, posted (8 years 11 months 2 weeks 3 days 7 hours ago) and read 2959 times:

To produce a matt finish isn't anything new in itself, merely another technique in the final phase of preparation. There is statically charged paint, but AFAIK it isn't use in the aviation trade, mostly in car factories. It is not necessarily for adhesion purposes, but for a cleaner, smoother surface.
Spencer.



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User currently offlineN766UA From United States of America, joined Jul 1999, 8234 posts, RR: 23
Reply 11, posted (8 years 11 months 2 weeks 3 days 7 hours ago) and read 2909 times:

Quoting B777200 (Reply 1):
I asked this same question earlier today, 17th September, 2005, in the Airliners.Net chat room. I was told it was to reduce glare effects for the Pilots.

Actually, this is why the area above the radome and below the cockpit windows is painted black. Note Air Tran and Southwest. It doesn't explain the black tip of the radome.



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User currently offlineAviatorTJ From United States of America, joined Jul 2003, 1838 posts, RR: 7
Reply 12, posted (8 years 11 months 2 weeks 3 days 5 hours ago) and read 2834 times:

I also remember reading in a magazine that when it originally came out that the black nose was used to show off the radar. It kind of worked along the cheat line technique. Personally, I wish AA would keep the black nose on their planes. I was looking through some of my photos the other day and had some of the NW bowling shoe planes with black noses. It's a damn good look.

Edit: After quickly perusing the database, I see no photographic evidence of this NW DC-10. Maybe I'll get to scanning my old old stuff soon.

[Edited 2005-09-18 18:52:14]

User currently offlineJorge1812 From Germany, joined Apr 2004, 3149 posts, RR: 8
Reply 13, posted (8 years 11 months 2 weeks 3 days ago) and read 2704 times:

My question is off-topic but I wonder why some cars in the US have black covers over the front too?

Georg.


User currently offlineEI321 From Iraq, joined Jul 2009, 0 posts, RR: 0
Reply 14, posted (8 years 11 months 2 weeks 3 days ago) and read 2670 times:

Malev still has the black nose:

http://www.airliners.net/open.file?i...nr=4&prev_id=922421&next_id=920282


User currently offlineJAM747 From United States of America, joined Feb 2005, 550 posts, RR: 1
Reply 15, posted (8 years 11 months 2 weeks 3 days ago) and read 2653 times:

[quote=Jorge1812,reply=13]My question is off-topic but I wonder why some cars in the US have black covers over the front too?

Georg.[/quote

The cover is called a 'bra' and it's function is to protect against gravel and small stones which might put scratches and chips in the bumper and hood while driving. Especially on the highway others cars and truck in front might flip these hazards on the the car behind. The 'bra' is made mostly from vinyl, or canvas material which is usually black. Some people put these on just for decoration if they like the look.


User currently offlineN1120A From United States of America, joined Dec 2003, 26444 posts, RR: 75
Reply 16, posted (8 years 11 months 2 weeks 2 days 23 hours ago) and read 2615 times:

Quoting Jorge1812 (Reply 13):
My question is off-topic but I wonder why some cars in the US have black covers over the front too?

Those covers, often called bras for slang (in German, it would be a BH), are supposed to protect the nose of the car from bugs and other road debris, though they normally have the function of causing uneven paint wear



Mangeons les French fries, mais surtout pratiquons avec fierte le French kiss
User currently offlineEilennaei From , joined Dec 1969, posts, RR:
Reply 17, posted (8 years 11 months 2 weeks 2 days 15 hours ago) and read 2473 times:

http://www.airmech.co.uk/forum/ultim...i?ubb=get_topic;f=116;t=000133;p=0

User currently offlineJorge1812 From Germany, joined Apr 2004, 3149 posts, RR: 8
Reply 18, posted (8 years 11 months 2 weeks 2 days 5 hours ago) and read 2266 times:

Quoting JAM747 (Reply 15):
The cover is called a 'bra' and it's function is to protect against gravel and small stones which might put scratches and chips in the bumper and hood while driving. Especially on the highway others cars and truck in front might flip these hazards on the the car behind. The 'bra' is made mostly from vinyl, or canvas material which is usually black. Some people put these on just for decoration if they like the look.



Quoting N1120A (Reply 16):

Those covers, often called bras for slang (in German, it would be a BH), are supposed to protect the nose of the car from bugs and other road debris, though they normally have the function of causing uneven paint wear

Thanks to you two.
That's what I thought too, but I thought just to protect the car it's too ugly...

Georg.


User currently offlineDean From Hungary, joined Apr 2005, 216 posts, RR: 1
Reply 19, posted (8 years 11 months 2 weeks 1 day 8 hours ago) and read 2118 times:

Quoting EI321 (Reply 14):
Malev still has the black nose:

http://www.airliners.net/open.file?i...20282

It's blue  Smile


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