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@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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