Hispano designed and built a 755hp piston engined advanced trainer, the HA.100 Triana. The HA-100 EI replaced the HA-43D-1 trainer. A tandem seater, tricycle landing gear, and with a gross weight of 6,460 lbs (2,932kg) was designed by Willy Messerschmitt.
It went into production for the Spanish Air Force in 1953.