The prototype of the Robin HR100 was the prototype DR253 Regent which was rebuilt with metal wings and powered by a 180 hp (134 kW) Lycoming O-360 engine. It first flew on 3 April 1969 as the Robin HR100/180. The HR100 is a low-wing cantilever monoplane with a conventional cantilever tail unit and a fixed tricycle landing gear. A number of different variants were produced in the 1970s. From 1972 a high-powered improved version was produced as the HR100/285 with a 285 hp (213 kW)
Continental Tiara 6-285B engine and retractable landing gear and airframe modifications.
French Air Force HR.100/250 communications aircraft at Nancy Essey airfield in 1977
The
French Air Force ordered a number of HR.100/250 aircraft in the mid 1970s and these were used for communications and other duties.
A two-seat trainer version was developed as the
HR200, and a modified version with a lighter airframe and new fin and rudder was developed as the
R1180 Aiglon in 1977.
Variants
HR.100 Royal
1969 Prototype with a 180hp (134kW)
Lycoming O-360 engine, one built.
HR.100/180
1976 Prototype with a 180hp (134kW) Lycoming O-360 engine, one built.
HR.100/200B Royal
Initial production version with a 200hp (149kW) Lycoming IO-360 engine.
HR.100/210 Safari
Production version with a 210hp (157kW) engine, 113 built of both 200B Royal and 210 Safari variants.
HR.100/235TR
Experimental HR.100 with an enlarged tail and retractable landing gear and a 235hp
Lycoming O-540-B engine, one built.
HR.100/250TR
HR.100/235 with a 250hp (186kW) Lycoming IO-540-C4B5 engine, 24 built.