Is an program that describes the Swedish WWII fighter FFVS J22. Downloads are HERE.
The design of fighter aircraft advanced in big steps around the mid 1930-s. Biplanes being replaced by monoplanes. Retractable undercarriages, enclosed cockpits and costant-speed propellers, became standard features. Douhets ideas of bombers being impossible to stop, became less true. Sweden has after much agony decided to set up its first fighter-only Wing. For that purpose was in 1937 Gloster Gladiator procured. A plane with nice characteristics, but a biplane with fixed undercarriage.
When the winds of a coming war became stronger, had Sweden to speed up to acquire new fighters. An order placed in US gave 60 P-35, before Roosevelt put an embargo on the rest. From Italy came Reggiane 2000 and Fiat CR42. The first with decent performance, but not so well built. The latter purchased because nothing else where aviable.
J22 was an project to be activated if no more fighters of decent quality could be found abroad. Swedish SAAB was fully occupied with their own B17, B18 and J21. They also build B5 (Northrop A-8) and SK14 (North American NA-16) on license.
The designer Bo Lundberg start to work on J22 in 1940, when he was stationed in the US. The conditions was to avoid use of duralumin. The quantity aviable was needed by SAAB.
To build in steel and wood was no novelty. Then often with a body of steel and wings in wood. The J22 however used an all steel structure, covered with wooden-panels. The patented method to assemble these panels, gave some flexibiltity to the joints, easier and faster to work with. The joints where also covered by glued strips of fabric. The wing was welded in a water-cooled robust jig. The undercarriage was rotated and then folded into the fuselage. This gave a stronger wing, but a narrower track. Control surfaces was made of a steel frame covered by fabric. Twin Wasp of 1065 hp (original or copied) was the power plant. This also on J9 (P-35), which was about 100 km/h slower. Twice the air resistance.
The J22 project was fully activated February 1941, maiden flight followed in September 1942, delivery to the airforce started October 1943.
Length: 7.8 m. Span: 10 m.
Weight Empty: 2000-2020 kg. Combat: 2760-2835 kg.
Max Speed: 560-580 km/h. Cruising: 500 km/h.
Ceiling (stated by maker): 9300 m.
Pratt&Whitney Twin Wasp. 14 cyl. air-cooled radial.
1065 hp at 2550 rpm.
Build in 3 versions:
Armament: 2/13.2 mm canons. 2/7.9 mm machine guns.
Armament: 4/13.2 mm canons.
Reconnaissance with cameras.
The here depicted aircraft was unique. It started its life as an J22-1 (serialnumber 22143). It was later used as an prototype for J22-2. The number was then changed to 22221. Then for some time serving as Red B, at the F10 Wing (Ängelholm).
An preserved J22 at Swedish Airforce Museum, Malmslätt (Linköping).
J22 in the pocketbook "Svensk Flygkalender 1946" (Swedish Aviationcalendar).
Image published in the Swedish magazine Foto (Photo) 7/1945. Photographer was Bo Dahlin, the picture named "Ovan molnen" (Above the clouds).
Advertising for the the Swedish copy of Twin Wasp (the engine in J22).
Swedish Twin Wasp mounted in test-bed.
©Jan Lindström 2019**
**excluding the 4 lower images