Syvyyspommi SP/31 and SP/41

[Dreamk]

I am looking for good drawings of the Finnish depth charges SP/31 and SP/41 and details of their fuzes.
These bombs, beyond their use by the Finnish Navy in the Russo Finnish wars and WW2, were also dropped from Finnish Blenheim and SB-2 bombers and Hoover, Rippon and Do22 seaplanes
However these Finnish bombers seem to have also dropped the Swedish Sjunkbomb M/33

All details about these bombs in Finnish service will be wellcome

Syvyyspommi SP/31:
Total Weight 207kg incl 135kg explosive
Length 720 mm [or 710 mm]
Diameter 445 mm
Min depth 25m
Max depth 80 m
Sink rate: ?


Syvyyspommi SP/41:
Total Weight 180kg incl 125kg explosive
Length 570 mm
Diameter 450 mm
Min depth 20
Max depth 120 m
Sink rate: ?

SP/41 ?? (needs to be confirmed)


Sjunkbomb M/33
Height 845mm (900mm with fuze)
Diameter 450 mm (440 mm ?)
Weight 176kg incl 105kg explosive (there was an export variant of this bomb weighting 135kg)
minimal depth 20m
maximal depth ?
sink rate 2.5m/s

Sjunkbomb M/33


SjunkBomb M/33 at the Finnish Aviation Museum in Vantaa


Loading a Depth bomb under a Do-22


Under a Finnish SB-2 on underwing rack and in bomb bay


Under a Hoover MF-11