On 5 July, 19:40, John Cochrane
wrote:
Charlie's report on the ssa website says it was the last three pilots
to launch who could not stay up, which seems a significant detail. If
the first to launch can find lift, get away from the airport, and wait
to start, but there really is zero lift in the airport area when the
back half of the grid launches, then the decision seems reasonable --
from this very far distance.

Maybe use towplanes to get the gliders to lift, then, rather than
using winches?

Ian