Density altitude on the range
Toowoomba sits near 700 m AMSL and summer afternoons routinely push density altitude past 1,500 m. Working payload drops materially — a load an aircraft lifts easily at Archerfield may be marginal at Highfields at 15:00. We plan Downs lifts on the day's actual density altitude, not the sea-level chart, and prefer early starts in summer.
