minimum flight speed

A variation of Sonerai was initially proposed to meet the 40 mph minimum flight speed requirement.

Flight tests showed that with the slats open at maximum flap angles the minimum flight speed decreased by 30%.

This placement utilizes the Coandă effect allowing a lower minimum flight speed and decreasing the amount of runway needed for takeoff and landing (i.e. STOL).

For a simple aircraft Vs1 is normally measured in level flight with flaps up, at MTOW and 1g wing loading, with engine idling and following a gradual deceleration to that minimum flight speed.

Application of the thrust vector control integrated into aircraft control system provides decrease of the minimum flight speed and piloting at low speeds (down to near-to-zero ones) without any angle of attack limitation (superagility mode).