R.36 Single-seat fighter powered by a
Hispano-Suiza 12Ycrs engine, one built. and a 3 × 20 mm
autocannons configuration was planned. Several variants were also planned but not built; The R.36B, a two-seater variant, the R.36E, a lightened two-seater training variant with a weaker engine (400 to 600 hp), and the R.36R, a standard R.36 but with smaller wings (16 m2 instead of 20). Planned armament was 4 × 7.7 mm
FN Browning machine guns or 2 ×
13.2 mm FN Browning shell firing guns. Technical documentation from the "Ateliers Renard" also mention the possibility of fitting the R.37 with a composite armament of 2 ×
13.2 mm FN Browning machine guns and 2 × 20 mm autocannons or with 6 × 7.7 mm
FN Browning machine guns.
R.38 Derivative of R.36 aircraft powered by a
Rolls-Royce Merlin II. One built, which was first flown on 4 August 1939 reaching a speed of during testing. Prototype evacuated to France but captured by German forces and scrapped. Technical documentation from the "Ateliers Renard" also planned the use of 4 × 20 mm
autocannons.
R.40 Unfinished variant of the R.38 built at the request of the French air force. It was supposed to be a high-altitude fighter with a detachable cabin armed with 4 × 7.7mm
FN Browning machine guns or 4 ×
13.2mm FN Browning machine guns. Technical documentation from the "Ateliers Renard" also planned the use of 4 × 20 mm
autocannons.
R.42 Proposed twin fuselage variant of the R.40, similar to the
F-82 Twin Mustang. Proposed armament was four
13.2 mm FN Browning shell firing guns and four 20 mm
autocannons, with an estimated top speed of 680 km/h. ==Operators==