sentences:  The type was completely redesigned as the Type 90-2-2 or E4N2, with a single main-float and twin, wing-mounted outriggers and introduced a cowled engine.This entered production for the Navy in 1931.A landplane version of the Type 90-2-2 was developed as the E4N2-C with a tailwheel undercarriage
  
  The E4N2 was employed as a shipboard reconnaissance seaplane launched by catapult.