From the BARCS website: F3K gliders are 1.5 metre wingspan, radio controlled models, launched using a
‘discus launch’ in which the glider is held by a wingtip and rotated around the flyer by hand before release.
Using this method of launching the average flier can achieve launch heights of greater than 140 feet, with the
top fliers exceeding 200 foot high launches.
For more information please see here:
There are no dedicated DLG competitions in Scotland but any fly-ins will be advertised in the usual places.
There are however a number of competitions world-wide.