On Nov 1, 12:23 pm, Ian wrote:
We did have a visit from a military ATC chap, and he said that a Good
Big Radar Reflector would help enormously. I was thinking about
installing an 18" aluminium cube reflector, made for yachts, in the
fuselage above the wheel.

I've idly wondered about that, but I'd want to know that slow targets
aren't simply removed from the screen before the radar operator even
sees them. Even several decades ago "ground clutter" was routinely
removed by simply ignoring any reflection with a doppler shift of
less than 70mph.

Clearly it has to be more sophisticated than that for airborne
radars,
but I'm sure it is possible.