Hispano Aviácion HA 100
The beginner trainer HA100 Triana took off for the first time in December 1953, however, it was not ordered despite its better performances in comparison to the North America T-28. Two prototypes were built, the HA100 E and the HA100 F.
The construction office "Officina Technica Prof. Messerschmitt" developed the aircraft and the construction of the prototype was completed by the Hispano Aviacion in Seville. The name Triana was named after a location in Seville where Hasa was established. It was Messerschmitt's first development after World War II.
The HA100 can be traced back to an announcement by the Spanish Aviation Ministry in 1951. Willy Messerschmitt looked after the essential construction work in Seville and in Munich. The development work was more difficult than expected. However the procurement of many construction parts and components was problematic. It affected the engines as well as the radiators, undercarriage parts, instruments as well as other parts.
The construction of two projects were designed: the beginner training- with a radial engine of 330 kW (450 PS) as well as one for advanced training which had a motor of 590 kW (900PS) each. Both versions basically differed in engine construction. The top speed of the beginner version was 387 kilometers an hour and the second version achieved 478 kilometers an hour. Aside from training aircraft pilots, the Triana could also be utilized for fighter jet training. For this task, two strong machine rifles with visors as well as a target camera were used. The Triana was also adapted for use in fighter bomb training.
The metal biplane offered two seats in tandem order. The wings that the Messerschmitt was equipped with had one longeron and a two-sectioned-wing unit. It was actuated through simple kinematics. The undercarriage was hydraulically retractable. The main undercarriage turned into the middle of the fuselage, the nose wheel retracted backwards into the fuselage.
Messerschmitt paid attention that the HA100 was a very simple construction. The engine cover consisted of only four parts. The engine cover was to avoid pollution and dirt from accumulating. The laterals are powered by an axis of rotation.
There were delays because the experimental framework was not available by Hispano Aviacion for statistic and dynamic tests. In fall 1953, the construction of the prototypes of HA100 were being continued. The engine used was the Elizaldo Sirio with 330 kW (450 PS) from ENMASA which was later given to Casa. Due to difficulties in delivery, another engine had to be used, the Beta of the manufacturer. He went back to an engine from the Wright company that was completed under license in the Soviet Union and constructed during the Spanish Civil War in Barcelona. Further delays were caused by outstanding flight authorization of the engine and delivery of construction parts such as undercarriage wheels from Great Britain.
Nevertheless, the HA100 E took off on its intial flight on December 1953, only 26 months after the signing of the treaty for construction of the prototype.
The poor experience of the Beta-engine led to the installation of the Cyclone 7 with 588 kW (800 PS) for the second prototype, the HA 100 F. This second prototype took off for the first time in February 1955. However, there was not enough money to purchase these engines. In 1956, the series of 40 aircrafts came to a halt. Parts of the HA100, as far as they were still able to be used, went to the later HA200 aircrafts.
In comparison to the North American T-28a, which was given preference, the HA100A had better characteristics. Since it was constructed to be relatively compact, material expenditure was diminished and, thus, the manufacturing price cheaper. The flight characteristics were impeccable and it was regarded as a convenient aircraft.
Technical data
Performance
| Top speed | 478 km/h |
| High altitude | 9,500 m |
Weight
| Framework weight | 1,743 kg |
Dimensions
| Length | 8.87 m |
| Height | 3.05 m |
| Span | 10.4 m |
| Wing area | 17.0 qm |
| Crew | 2 |
