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Hello this topic about Swedish experimental Stormpjäs fm/43 150mm recoilless gun in 1943.
Work on such a chassis began on November 11th when KAFT asked Scania-vabis to construct a new type of SPG to investigate the merits of using a rear mounted superstructure. While the driver would retain his position the engine would be moved as far forward as possible & the rest of the crew would be moved to a open topped compartment at the rear to give them more room for servicing the gun. The superstructure was to be constructed as that of the Pav m/43 though with the modifications necessitated by the new configuration. The 15 cm Stormpjäs fm/43-44 or “Trätoffelvagnen” (Translating to clog wagon) as it came to be known would be finished and tested in august of 1944.
the same gun mounted on the chassis of the Strv m/41, essentially a license built Swedish Panzer 38(t)
Basically Sweden strum tiger with no armor.
More History
In parallel with the development of the Pav m/43 KAFT in cooperation with Bofors had continued testing ideas for the SPG requirement on the strv m/38 based chassis. By July of 1943 the vehicle had been rebuilt yet again, this time with an experimental 15 cm recoilless rifle based on the 15 cm fsthaub m/02 fortress gun. This impressive gun fired a 37 kg high explosive shell at 300 m/s and had good firing characteristics, however the overloaded and cramped chassis suffered from a poor rate of fire and low mobility. Despite the obvious drawbacks of this design serious consideration was made to convert 12 Strv m/38’s to this configuration as a quick and easy alternative to the Pav m/43. The vehicle was demonstrated to KAFT representatives and the chief of the army on the Bofors test range on the 4th of November 1943. 16 rounds were fired at a variety of targets from prepared positions and in terrain without fault. The results of the testing was that the gun was deemed a valuable asset, however a new purpose designed chassis with room for ammunition and personnel would need to be constructed should the gun be fielded
The vehicle weighed around 10 tons and mounted a slightly lengthened version (by 400 mm) of the 15 cm recoilless rifle tested the previous year. The crew consisted of two loaders (L) & (M) located on the left side of the gun, one gunner/commander (R) on the right and a driver (F) and machine gunner (K) located in the hull. The vehicle was successfully tested on the 18th of august 1944, firing 17 rounds at a target at 530 m range. With the 3 man gun crew a rate of fire 4 rounds per minute was achieved. In October 1944 the chassis was also tested as a tank destroyer by mounting a 75 mm Pvkan m/43, plans were also drawn up for a version mounting the 7,5 cm Lvkan m/36 L/60 anti aircraft gun by AB Bofors. This version was tested as a alternative to the introduction of 7,5 cm towed anti tank guns and would have been able to dismount the gun for use in fortified positions. This version was referred to as Motorlavettage 10 ton (gun carrier 10 ton) or simply as Sav fm/43 with 75 mm pvkan m/43. After further trials in 1945 the project was canceled and the chassis used as a training vehicle for the Sav m/43.
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