Designed to meet a requirement for a three-seat fighter with an endurance of three hours at 90% max speed, the Potez 670 was configurationally similar to the Potez 630 and 631. Flown for the first time on 30 March 1939, the Potez 670 had meanwhile been modified as a two-seat long-range escort fighter and bomber destroyer.
Initially powered by two 700hp Gnome- Rhone 14M radials, it was re-engined after initial flight trials with two 800hp Hispano-Suiza 14AB 12/13 radials, with which it resumed flight tests in July 1939 as the Potez 671.
Several production variants were proposed, but flight trials were incomplete at the time of the French collapse and the sole prototype was destroyed during the German onslaught. At the time, work had begun on an initial batch of 40 Potez 671 C2 fighters.
Potez 670
Engines: 2 x Gnome & Rhone 14M-3, 700 hp
Wingspan: 15.10 m
Wing area: 32.50 sq.m
Length: 10.80 m
Height: 3.27 m
Empty weight: 3120 kg
Maximum take-off weight: 4680 kg
Maximum speed: 460 km / h
Cruising speed: 412 km / h
Practical range: 1800 km
Service ceiling: 10,000 m
Crew: 2
Armament: 2 x 20-mm cannon Hispano-Suiza HS-404 front, 2 x 7.5-mm machine guns MAC 1934, 1 x 20-mm cannon Hispano-Suiza HS-404 rear-firing turret
Potez 671
Engines: 2 x Hispano-Suiza 14AC, 800 hp
Wingspan: 15.10 m / 50 ft 6 in
Wing area: 32.50 sq.m / 349.83 sq ft
Length: 10.80 m / 35 ft 5 in
Height: 3.27 m / 11 ft 9 in
Max take-off weight: 4726 kg / 10419 lb
Empty weight: 3186 kg / 7024 lb
Max. speed: 500 km/h / 311 mph
Cruising speed: 445 km / h
Maximum rate of climb: 876 m / min
Service ceiling: 10,500 m
Range: 2000 km / 1243 miles
Crew: 2
Armament: 2 x 20-mm cannon Hispano-Suiza HS-404 front, 2 x 7.5-mm machine guns MAC 1934, 1 x 20-mm cannon Hispano-Suiza HS-404 rear-firing turret
All Aero 