the shuttles
in "the magic spell of circe", helios comes crash in the desert before striking the knowledge's tower of the magician.
in "trapped between fire and ice", helios gets damage against the ice planet charyboes' walls.
the space ship is dragged down into the fire of scylla ; ulysses has got only five minutes to escape and loose the shuttle.
the fighting shuttle dardos is disintigrated by cerberus the guardian of the "kingdom of hades", just like the flying radar : god thanks, the passengers' cockpit is ejected in space before exploding.