Complex sentence: One of these he succeeded in destroying by tipping it up with the wing of his aircraft, an event sketched into his logbook by fellow pilot and amateur artist, Flt Lt Tom Slack, who titled the drawing Tip "em Up Terry".
Split into simpler sentences: One of these he succeeded in destroying by tipping it up with the wing of his aircraft, an event sketched into his logbook by fellow pilot and amateur artist, Flt. Lt. Tom Slack, who titled the drawing Tip "em Up Terry".