Gourdou-Leseurre GL-820 HY
# Gourdou-Leseurre GL-820 HY

The Gourdou-Leseurre GL-820 HY family of four-seat single-engined floatplanes were designed and built in France during the latter half of the 1930s by Gourdou-Leseurre. The GL-820 HY and GL-821 HY 02 were shipborne reconnaissance / observation aircraft, while the sole GL-821 HY was built as a torpedo carrier.

## Design and development

The Gl-820 and GL-821 were low-wing monoplane floatplanes with four tandem open cockpits, (the Cockpits on the GL-821 HY 02 were enclosed). The wings, tailplanes and floats were all supported by a system of streamlined struts.

## Variants

### GL-820 HY

    The initial reconnaissance aircraft prototype, powered by a 730 hp (540 kW) Hispano-Suiza 9Vb driving a two-bladed fixed-pitch wooden propeller.

### GL-821 HY

    The second aircraft built as a torpedo carrier, powered by a 750 hp (560 kW) Gnome & Rhône 9Kfr.

### GL-821 HY 02

    The third aircraft, powered by a 750 hp (560 kW) Gnome & Rhône 9Kfr driving a three-bladed metal propeller.

## Specifications (GL-821 HY)

Data from Aviafrance : Gourdou Leseurre GL-821 HY, Gourdou Leseurre GL-821 HY 02, Gourdou Leseurre GL-820 HY

General characteristics

* Crew: 4
* Length: 11 m (36 ft 1 in)
* Wingspan: 16 m (52 ft 6 in)
* Height: 5.2 m (17 ft 1 in)
* Wing area: 44 $m^2$ (470 sq ft)
* Empty weight: 1,950 kg (4,299 lb)
* Gross weight: 3,200 kg (7,055 lb)
* Powerplant: 1 × Gnome & Rhône 9Kfr 9-cylinder air-cooled radial piston engine, 560 kW (750 hp)

             GL-820 HY: 1 x 730 hp (540 kW) Hispano-Suiza 9Vb 9-cylinder radial

Performance

* Maximum speed: 220 km/h (140 mph, 120 kn)

             Gl-820 HY: 215 km/h (134 mph; 116 kn)
             Gl-821 HY 02: 235 km/h (146 mph; 127 kn)
* Range: 1,000 km (620 mi, 540 nmi)
* Service ceiling: 7,000 m (23,000 ft)

Armament

* Guns: 1 × fixed forward firing 7.5 mm (0.295 in) Darne machine gun in the starboard wing; 2x 7.75 mm (0.305 in) Lewis guns on a flexible mount in the rearmost cockpit
* Bombs: 300 kg (660 lb) of bombs (GL-820 HY and GL-821 HY 02) or one torpedo (GL-821 HY)
