Safety capsule: Altitude density and performance of your aircraft
In these hot and humid weather, we thought we would remind you of the negative effect of density altitude on the performance of your aircraft.
The performance of your device depends on airport altitude, ambiant atmospheric pressure, temperature and humidity. If these parameters increase, the lift, rate of climb and power of your engine will be reduced. The only thing that increases...is your stall speed. So in hot and humid weather you lose on all counts.
Consult your POH to understand the performance curves of your aircraft. This will allow you to make an informed decision before your takeoff.
Here's a classic example, with some tips, courtesy of Flight Chops:
Our best advice is the 50/70 rule. If you have not reached 70% of your takeoff speed at 50% of the available runway length, you should abort your takeoff.