Jean-Louis,

In UK 60m is the flying limit and 30m near an airport but I think
you'd have to be seriously daft to fly a kite near an airport anyway.
You can fly higher too.... for permission to exceed the limits stated
above you are required to complete an application form.  Details from

Airspace Utilisation Section
Directorate of Airspace Policy
Civil Aviation Authority
K1
45-59 Kingsway
London WC2B 6TE
Direct Dial: 020 7453 6599 or 6585
Fax: 020 7453 6593

A high value bleed resistor with a thick conductor connector to a
ground rod should always be attached from any down lead
before entering a vehicle or property etc. Especially in Summer and if
on a hill make sure you don't emulate Franklin's proposed experiments!

72
Dom
M1KTA

On 10 March 2010 08:16,  <[email protected]> wrote:
> Hi all
>
> May I ask you to pay some attention on the three following issues related to 
> balloon/kite aerials ?
>
> - using "high" altitude kites or balloons is often subject to a formal 
> authorization (at least in France, and specially if you expect to use the 
> aerial close to an airfield)
>
> - even when weather is very good, very high DC voltages (many  kV) can appear 
> (from natural local electric field) on the antenna wire. DC grounding of the 
> wire is therefore mandatory
>
> - avoid any AC HV lines (or schools, or roads, or irritable neighbours) in 
> the vicinity of your experiment area.
>
> Regards
>
> Jean-Louis F6AGR
>
>