Fuselage Interference Effect: The Available Data points to Conclusions Favourable to the High Wing in Monoplanes

IT has been found by model tests that the lift of a combination of an aeroplane body and a wing is not in general equal to the sum of the lifts of the two components when tested separately. This difference is broadly referred to as an interference effect. It is dependent on a number of factors which can be generalised into three groups:—