On Sun, 11 Oct 2009 12:33:42 +0100, Tim Ward wrote:

You'd have to be doing some really bizarre low flying for them to get in
the way of line of sight VHF radio. Not something I've ever heard of
being a problem.

Military. Was out with the RAF just before Gulf War I, they were
flying sorties out over the Saudi desert, they get seriously low when
in combat rather than excercise conditions. They were down to a few
tens of feet, camels were a hazard...

A wind turbine has a blade tip height of 350 to 400' the fast jets
round here are below that level. We look down on some of the slower
stuff, hercy birds and helos etc that are really hugging the ground.

Windmills do disrupt RF propagation it's not unknown for TV reception
to be disrupted if there is a windmill close to the path.

--
Cheers
Dave.