You weren't reading what he was saying, Cy. In the very early days of ELTs,
then didn't have to have external antennas. The contemplation is that whatever
tore the airplane up would have torn it up enough that the ELT would have been
exposed to the point where an antenna connected directly to the ELT body itself
sufficed for the installation. No external antenna.

I haven't seen an approved design like this for thirty years or so, but at one
time, it was all the rage. One manufacturer actually had a steel tape measure
segment spring loaded to uncoil at some g load and act as the antenna.

Jim


"Cy Galley"
shared these priceless pearls of wisdom:

-I believe that the C-150 has a metal skin that acts like a ground plane
-automatically.


-
-"UltraJohn" wrote in message
hlink.net...
\

- Most older C-150's that were retrofited with an ELT use an ELT with a whip
- (1/4 wave) fixed to the ELT with no groundplane. Would I recommend this
-for
- a com radio? no! but it does work in thousands of C-150's (and probably
- others I'm just familiar with 150's). anyway KISS is the best.
- John
-

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com