When performing a touch and go, when is it appropriate to advance the throttles for takeoff?

The appropriate moment to advance the throttles for takeoff during a touch and go is after confirming flap position. This confirmation is crucial because the flap setting directly affects the aircraft's lift and performance characteristics during takeoff. Ensuring that the flaps are set to the correct position before initiating the takeoff allows the pilot to maintain optimal control and performance of the aircraft in the takeoff phase.

Advancing the throttles after confirming flap position ensures that the aircraft is configured correctly for the conditions, allowing for a smooth transition from landing to takeoff. This approach enhances safety and efficiency during the maneuver. The flap position is an essential factor in achieving the necessary lift needed for a safe takeoff, especially in a multi-engine aircraft like the C-17.