"Ken Kochanski (KK)" wrote in message
oups.com...
A friend forwarded the following study ... has anyone tested
Transponder Antenna output on a graphite ship without an additional
ground plan?

.....Snip....

.... Results show that the 50 ply sheet of graphite epoxy behaves
identically with an aluminum ground plane when used with a monopole or
dipole receiving antenna at 370 and 837 MHz


50 ply! How many layers of graphite are used in the construction of the
average sailplane?

Wayne
HP-14 "6F"
http://www.soaridaho.com/