[Amps] crossmodulation in PA ? Thanks for all good??advice

[K8MLM at aol.com]

Yup... they sure do with big flexible double 00 flexible bonding  
connections... the bonding cables are inside the wing structure where you don't  see 
them.   Composites are a problem in some of the new  aircraft.  They imbed carbon 
conducting paths to make sure they can conduct  lightning away.  Look at the 
radar dome on the nose of big commercial  airliners.  There are things that 
look like ribs radiating from the radar  dome nose back to the metal body of the 
aircraft.  They are there to  conduct lightning away from the nose and antenna 
and back to the metal  body.
 
I've been to one of the Navy Test Facilities where they zap aircraft with  
hundreds of thousands of volts to test their integrity.  The aviation  community 
is very serious about grounding and bonding.  
 
The surface Navy is also very serious about grounding and bonding.   
Especially with very high power radar and numerous radio transmitters and  receivers 
in a relatively small area... even and aircraft carrier becomes small  when one 
is looking for extra space for an antenna.  Every ungrounded or  
"semi-ungrounded conductor in the superstructure becomes a source of cross  modulation and 
interference.  Mixing and re-radiation is a constant source  if interference 
and the US Navy spends big bucks to keep it under control.
 
MIL-STD 461E and 464A cover the standards and processes for aircraft, ships  
and vehicles.
 
Bob
 
K8MLM
 
In a message dated 9/7/2007 7:37:18 P.M. Eastern Daylight Time,  
sub1 at rogerhalstead.com writes:

>Not  quite true.

>Look at MLI-B-5087B, Military Specification - Bonding,  Electrical, and
>Lightning Protection for Aerospace Systems and the FAA  Lightning Protection
>Handbook, DOT/FAA/CT89/22.  My copies are  old, but bonding straps are 
>provided at
>Flap and control  surface hinges to prevent welding from lightning 
>currents.
>Many  aircraft are hit by lightning while in  flight.  Would you want to  be
>riding on one without properly bonded  airframe and control  surfaces?

Do they still do that?
I've never seen a plane with the  control surfaces bonded like that although 
I don't get to see many  military planes. The only thing I've seen so far are 
static wicks on  control surfaces






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