At what speed must the landing gear be retracted (VLE RET)?

The speed at which the landing gear must be retracted, known as VLE RET (landing gear retraction speed), is an important operational parameter for an aircraft. For the ERJ series, this speed is 250 knots. The retraction of the landing gear is critical for maintaining aerodynamic efficiency and reducing drag, which allows the aircraft to achieve the desired climb rate and performance after takeoff.

Setting the retraction speed at 250 knots ensures that the aircraft is within a safe operational envelope, allowing the pilots to retract the gear without risking structural damage or aerodynamic instability. This speed is specifically provided in the aircraft's operating manual and is based on extensive testing and performance calculations. Following the correct procedure ensures both the safety and efficiency of the flight.