Complex sentence: In 1973 Heckmann flew alone in a Scheibe Falke powered glider from Rotenburg an der Wümme (between Bremen and Hamburg) and Perth in West Australia in 230 hours and 34 minutes, establishing what sources describe as an "unofficial world record" in the process.
Split into simpler sentences: In 1973 Heckmann flew alone in a Scheibe Falke (powered glider) from Rotenburg an der Wümme (between Bremen and Hamburg) to Perth in West Australia. It took 230 hours and 34 minutes, establishing what sources describe as an "unofficial world record" in the process.