Developed from the Latécoère 28.3, the Latécoère 29 design in 1928 won a French Navy competition for a new torpedo-bomber floatplane. The Latécoère 29.01 prototype was fitted temporarily with a wheeled landing gear arrangement and first flew in October 1931. After successful land-based and waterborne trials, the type entered production.
Twenty Latécoère 290s were ordered in 1932 and another 10 in the following year as the equipment of two squadrons. Survivors were relegated to the training role early in 1939, but became operational again after the outbreak of World War II, serving as coastal anti-submarine aircraft. One-off variants were the Latécoère 293 with the 540-kW (750-hp) Gnome-Rhone l4Kcrs radial and a larger rudder, the Latécoère 294 with a l4Kdrs engine, modified nose and redesigned vertical tail, and the Latécoère 296 with a 641 -kW (860-hp) Hispano-Suiza l2Ydrs-1 engine.

Variants:
Laté 29: [Project] 3-engined flying boat
Laté 29: torpedo bomber adaptation of Laté 28

Laté 29 Series – 1930 design, torpedo-patrol bomber adaptation of Laté 28
Laté 29-0: 1931 torpedo floatplane, 1 x 650 hp HS.12Nbr, 32 built
Laté 29-0 exp.: 1 x Ratier var.-pitch prop; 1 x stainless floats
aka Laté 290
Laté 29-1: ordered for Marine but Laté 29-0 often listed as prod. model
Laté 29-2: [??]
Laté 29-3: 1932-33 torpedo floatplane, 1 x 725 hp G-R 14Kcrs, 1 built
aka Laté 293, some sources give 800 hp as power for G-R 14Kcrs
Laté 29-3 lost wing in 1933 while flown by Antoine de Saint-Exupéry
Laté 29-4: 1934 torpedo floatplane, 1 x 740 hp G-R 14Kdrs, 1 built
Laté 29-4: redesigned rear fuselage (to improve gunner’s field of fire)
aka Laté 294, some sources give 830 hp as power for G-R 14Kcrs
Laté 29-5: [??]
Laté 29-6: torpedo floatplane, 1 x 860 hp HS.12Ydrs, 1 built
aka Laté 296 [rear fuselage as per Laté 29-0 or Laté 29-4 ?]
Laté 29-7: [??]

Spacifications:

Latécoère 290
Engine: 1 x Hispano-Suiza l2Nbr, 485kW (650 hp).
Span: 19.25m (63ft 1.75 in)
Length: 14.62m (47ft 11.5 in)
Armament: 3×7.7-mm (0.303-in) machine-guns plus 1×670-kg (1,477-lb) torpedo or 2×150-kg (330-lb) bombs. Max T/O weight: 4800 kg (10,582 lb)
Max speed: 131 mph at sea level.
Operational range: 435 miles with maximum warload.
Seats: 3

Latécoère 293
Engine: 540-kW (750-hp) Gnome-Rhone l4Kcrs

Latécoère 294
Engine: Gnome-Rhone l4Kdrs

Latécoère 296
Engine: 641 -kW (860-hp) Hispano-Suiza l2Ydrs-1

Developed from the Latecoere 26, the Latecoere 28.0 was a braced high-wing monoplane powered by a Renault 12Jbr engine. The enclosed cockpit accommodated a pilot and co-pilot/ engineer, and the cabin was furnished for eight passengers. Seventeen Late 28.0s were followed by 29 Late 28.1 aircraft with a 373kW Hispano-Suiza 12Hbxr engine. A number of Late 28.0s were converted subsequently to Late 28.1 standard.
The sole Late 28.2 was a mail carrier and established several payload/speed world records in 1931. The first of five Late 28.3 mail carriers was flown by Jean Mermoz on 11/12 April 1930 to achieve a world closed-circuit distance record for seaplanes of 4308km.
The remaining Late 28.3s were used on Mediterranean routes and charter services. The Late 28.1/H was a wheel landing gear version of the Late 28.3. Two one-off aircraft were the Late 28.3-I, a passenger version of the Late 28.3, and the Late 28.4-I, also developed from the Late 28.3 but powered by a Gnome-Rhone 14Kbr radial engine of 522kW. In 1930 there appeared the Late 28.5, structurally strengthened and powered by a 485kW Hispano-Suiza 12Nbr, followed by three Late 28.6 aircraft, also Hispano-powered and built for Venezuela, which had already purchased two Late 28.1s.

Variants:

Laté 28
Laté 28-0: 1 x 500 hp Renault 12Jb V12, 2 crew + 8 pax
Laté 28-1: 1 x 500 hp Hispano-Suiza 12Hbr, 2 crew + 8 pax
Production of Laté 28-0 and ’28-1 totalled at least 47 a/c*
Laté 28-2: record aircraft (5 Int’l speed records, 1 x 650 hp HS.12Nbr, 1 built
Laté 28-2 had Lamblin radiators, carried twice Laté 28-1’s payload
Laté 28-3: twin-float seaplane airmail transport, 600 hp HS.12Lbr V12
Laté 28-3 ‘Comte-de-La Vaulx’ F-AJNQ, trans-South Atlantic, 12-13 May 1930
Laté 28-4: Laté 28-4-01, 1 x 700 hp Gnome-Rhone 14KB radial, 1 built
Laté 28-5: military floatplane for Aéronavale, 1 x 650 hp Hispano-Suiza 12Nb
Laté 28 c/n 92 ‘La Frégate’ record breaker flown by Lt de Vaisseau Pâris
Laté 28-6: Laté 28-6-1, 3 x HS.12Nb-powered a/c for Venezuela, conv to Laté 28-9
Laté 28-7: [Project] Laté 28-0 with 700 hp Renault 12Mc, not built
Laté 28-8: 1930 record attempt a/c, 1 x 650 hp Hispano-Suiza 12 Nbr, 1 built
Laté 28-8 c/n 916** F-AJXL had and enlarged wing, it broke up in flight
Laté 28-9: Laté 28-9-1, 3-seat bomber with dorsal machine gun mounting

• Production for Aéropostale x 38, Aviacion Nacional Venezolana x 3, Linea Aeropostal Venezolana x 2, and Aeroposta Argentina (an Aéropostale subsidiary) x 4.

Aéropostale Laté 28-0: c/n 910 F-AJOU, 916 ‘OV, 917 ‘OX, 923 ‘OY, 924 ‘OZ, 925 F-AJPA, 926 ‘PB, 927 ‘PC, 929 F-AJUV, 930 ‘UX, 931 ‘UY, 932 ‘UZ, 933 F-AJVB, 934 F-AJVH, 935 ‘VI, 936 ‘VJ, and 937 ‘VK (all conv. to Laté 28-1 standards, 1933-35 except 917, 931, 923, & 937).

Aéropostale Laté 28-1: c/n 902 F-AJHS, 903 F-AJIO, 904 F-AJIX, 905 F-AJIP, 906 F-AJIQ, 908 F-AJJM, 911 F-AJLB, 912 F-AJLE, 913 F-AJLM (YV-ABU, 914 F-AJLN, and 915 F-AJLO.

Air France Laté 28/1H: c/n 941 F-AMX, 943 F-AMXV, and 944 F-AMXX

Aéropostale Laté 28-3 c/n 921 F-AJPF, 922 ‘PG (conv. to Laté 28-1), & 940 ‘PH

** NB: It’s difficult to pin down exact Laté 28 variant numbers. In part, this is because of individual airframes being modified between variants. In other cases there is c/n duplication in registration records – eg: c/n 918 is listed both as the record-breaking Laté 28-8 airframe and as Aeroposta Argentina’s F-AJPD which crashed in Rio Plate estuary.

Specifications:

Late 28.1
Engine: 1 x Hispano-Suiza 12Hbxr, 500hp
Max take-off weight: 4040 kg / 8907 lb
Empty weight: 2440 kg / 5379 lb
Wingspan: 19.25 m / 63 ft 2 in
Length: 13.64 m / 44 ft 9 in
Height: 3.58 m / 11 ft 9 in
Wing area: 48.60 sq.m / 523.13 sq ft
Max. speed: 232 km/h / 144 mph
Cruise speed: 200 km/h / 124 mph
Ceiling: 5200 m / 17050 ft
Range: 1000 km / 621 miles
Range w/max.fuel: 1000 km / 621 miles
Crew: 3
Passengers: 8

The Late 26 (about 70 were built during 1928-30 mainly for Aeropostale) was primarily a mailplane, although it accommodated two passengers. A Laté 25 development, the Late 26 featured three open cockpits in line and power was provided by a 450hp Renault 12Ja engine in the Late 26.2R and a 500hp Renault 12Jb in the Late 26.6R. Square- replaced the round-section fuselage of the Laté 25.

Late 26.2R
Engine: 1 x 450hp Renault 12Ja
Max take-off weight: 3364 kg / 7416 lb
Empty weight: 1590 kg / 3505 lb
Wingspan: 17.40 m / 57 ft 1 in
Length: 12.20 m / 40 ft 0 in
Height: 3.90 m / 12 ft 10 in
Wing area: 48.60 sq.m / 523.13 sq ft
Max. speed: 188 km/h / 117 mph
Cruise speed: 157 km/h / 98 mph
Ceiling: 4500 m / 14750 ft
Range: 680 km / 423 miles

The 1926 Latecoere 25 monoplanes had a four-seat cabin, single 450hp Renault and a one ton payload.

Laté 25-1R: 1927 prototype Laté 25-1 conv. from Laté 17 (603/F-AIEH)
Laté 25-2R: 1929 production version, 1 x 450 hp Renault 12Ja
Laté 25-2R were conv. from Laté 17, Laté 17, and Laté 17-3R
Laté 25-3R: 1931, 1 x 450 hp Renault 12Ja
Laté 25-3R were conv. from Laté 17, Laté 17-1J, Laté 17-3R
NB: Laté 25/4R listed as Laté 17-1J 607/F-AIHF conv. [typo?]

A 1925 single-seat parasol monoplane mail carrier, Laté 17 derived.
Laté 22-01: 1 x 230 hp Lorraine-Latecoere 8Bd, 1 built