Abstract: A flight test aid comprising means to measure force that is applied by a pilot to the controls (7) of an aircraft to adjust the control surfaces while manoeuvering the aircraft which utilizes a plurality of sensors (5-6) supported in the interface between the control member (7) and the part of the pilot (1) operating the control and means (9) to record the force from the sensors (5-6) preferably through differencingmeans (21) to cancel pressure applied equally to the sensors (5-6). A typical example is a glove (1) with finger and palm sensors (5-6) connected to indicator means (9) preferably through a differencer (21).