Three different problems encountered in the sport of soaring will be discussed: First, as an introduction, the classical "Mac Cready problem", which is concerned with the determination of the best cruise speeds in between columns of rising air under cumulus clouds, will be reviewed. Next a new solution concept will be presented for the "optimal dolphin soaring problem". This is the problem of the best (varying) speed through regions with varying vertical atmospheric velocities. Finally, some new ideas will be discussed which make new solutions possible to the "optimal zigzagging problem", which is the problem of whether, and if yes, how to make use of favorable regions with upwards directed atmospheric velocities which are present aside of the track to be flown.
|ISSN van geprinte versie||0926-4493|