Throughout the war the E Class served with conspicuous success; but they also suffered very severely, more than half their number being lost.
As with the D Class, the E boats had twin screws. Their diesels developed 1600 hp which gave a surface speed, in service, of 14 knots. The submerged speed was 9.5 knots, produced by 840 hp electric motors. The radius of action of the E Class was 3000 miles on the surface at 10 knots and up to 65 miles submerged, at approximately 5 knots.
