Developed in parallel with the R-37, the R-38 was essentially similar to the R-36 apart from having a 1030hp Rolls-Royce Merlin II engine. It was originally proposed with wings of two different sizes, but the sole prototype retained a similar wing to that of the R-36 and R-37. Armament comprised four wing-mounted 7.7mm or 13.2mm machine guns.

The R-38 flew for the first time on 4 August 1939, and gave excellent results during its test programme, which was still in process when German forces occupied Belgium. The sole prototype was flown to Bordeaux when the final collapse of Belgian resistance became inevitable, but was scrapped after capture in France by German forces.

Max take-off weight: 2600 kg / 5732 lb
Empty weight: 1950 kg / 4299 lb
Wingspan: 11.64 m / 38 ft 2 in
Length: 8.80 m / 29 ft 10 in
Height: 2.90 m / 10 ft 6 in
Wing area: 20.00 sq.m / 215.28 sq ft
Max. speed: 545 km/h / 339 mph
Range: 1350 km / 839 miles

With an airframe fundamentally similar to that of the R-36, the R-37 differed primarily in having a close cowled 1100hp Gnome-Rhone 14N-21 14-cylinder radial engine. Cooling air reached the engine via a narrow annulus, was mixed with exhaust gases and ejected through two groups of nozzles to provide some thrust augmentation.

The proposed armament consisted of four 7.7mm or two 13.2mm machine guns mounted in the wings.

Although the R-37 was displayed statically at the Salon de Bruxelles in July 1939, no attempt had been made to fly this prototype before the German occupation of Belgium in May 1940. The R-37 was discovered at Evere by the occupation forces and a Luftwaffe pilot – possibly unaware that the aircraft had not previously been flown – flew the aircraft to Beauvechain. There is no record of any subsequent flight testing, although it is known that the R-37 was taken to Germany. Prior to the German occupation, Alfred Renard had prepared a project for a two-seat version, the R-37B, for use as a ground attack aircraft.

Max take-off weight: 2460 kg / 5423 lb
Empty weight: 1810 kg / 3990 lb
Wingspan: 11.64 m / 38 ft 2 in
Length: 8.40 m / 28 ft 7 in
Height: 2.90 m / 10 ft 6 in
Wing area: 20.00 sq.m / 215.28 sq ft
Max. speed: 510 km/h / 317 mph

Designed by Alfred Renard as a replacement for the Fairey Firefly in service with the Aviation Militaire, the R-36 was flown for the first time on 5 November 1937.

An advanced low-wing single-seat fighter, the R-36 with Hispano-Suiza engine was exhibited at the 1937 Brussels Aero Show.

Of all-metal construction and carrying an armament of one engine-mounted 20mm cannon and four wing-mounted 7.7mm machine guns, the R-36 was powered by a 910hp Hispano-Suiza 12Ycrs 12-cylinder Vee-type liquid-cooled engine. Various modifications were introduced during the test programme – notably the relocation of the radiator bath and the enlargement of the rudder.

Late in 1938, the government took an option on a batch of 40 aircraft. The loss of the prototype on 17 January 1939 resulted in the programme being placed in abeyance and then dropped when the decision was taken to procure Hawker Hurricanes.

Max take-off weight: 2470 kg / 5445 lb
Empty weight: 1770 kg / 3902 lb
Wingspan: 11.64 m / 38 ft 2 in
Length: 8.80 m / 29 ft 10 in
Height: 2.90 m / 10 ft 6 in
Wing area: 20.00 sq.m / 215.28 sq ft
Max. speed: 505 km/h / 314 mph
Range: 1000 km / 621 miles

A training monoplane that appeared in 1932-1933