negative

negative thrust propeller / negative-thrust propeller

infrared / negative ultraviolet (IR/NUV) seeking

negative electrical charge

negative report

battery negative post

negative dihedral

negative dihedral effect

negative dihedral situation

negative dihedral wing

negative source

negative stability

negative vertical acceleration

negative contact

negative sensor

negative enemy contact

negative contact (in cloud)

negative contact on

Enables reversible motor direction to provide negative thrust and allow inverted flight

negative thrust

emergency negative thrust