Abstract: Methods for solving plane potential flow past a lattice of arbitrary cascades of airfoils have been given by various investigators, notably, Garrick 1, Mut-terperl 2, and 3. As all these methods are based on. the solution of the straight line cascades, they have the drawback that the process becomes laborious for high cambered blades. To overcome this difficulty, it is suggested, in the present paper, that the part of the straight line cascades used in the above mentioned methods may be replaced by curved line cascades. To achieve this end, a simple and exact solution for plane potential flow past a lattice of curved line cascades is established. This solution contains four parameters, which can be used to adjust the inlet and the outlet angles of the blades and the solidity and the angle of the cascades.