Further development of the Gloster III. Three built.
Gloster IVB Engine: 1 x Napier Lion VIIB, 660kW Max take-off weight: 1499 kg / 3305 lb Empty weight: 1185 kg / 2612 lb Wingspan: 6.90 m / 22 ft 8 in Length: 8.03 m / 26 ft 4 in Height: 2.79 m / 9 ft 2 in Wing area: 12.91 sq.m / 138.96 sq ft Max. speed: 475 km/h / 295 mph