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,
-
6 -
vertical ob jects such as co a n * t w a lls , construction worka made
of steel , su ports or heavy ma chine parts .
For this reason it
is preferrable to use thick - walled rnultiple-purrose bom s rath er
han thin high - explosive barabs against this tvp- f target .
T : e high - e-plosive bombs weighing from 110 to 1 ,
100 lbs
a r e s u f f i _
c i en t l y s o l i d f or be i ng dr oppe d f r orn h i g h a l t i t ude s on
ordinary unprotected round targets and naval vessels ,
if delayed -
- action fuses are used .
Th e limit for tress res i stance for th e SC z50 ,
for instance ,
is 50 - mm structu •al steel
or 4 00 - rn reinforced
concrete f or
quali ty I b ombs ,
30 - mm structural steel or 250 - mm
r ein ^rced concrete for qualit •
y II bor b s , and 20 - mm stee l or 150 - mm
concrete for quality III .
Th ese fi , ur es were obtained during tests
Y i t h i s x Uo nbs a a i ns t s t e e l a nd c on cr e t e pl a t e s by s pe c i . a l
•
t e s t i ng pr o c e dur e s .
In a t t a cks on s hi ps ozl e u us t a l - a ys us e onl y
quality I hi ,
gh - explos i ve bombs .
The impact s+rese resistance of the vario s bombs was currently
t e s t e d upon e a c h d e l i v Pr y wh en s arapl e b o ubs rer e dr opp e d on r o oky
g ound .
nioh - explosive and multiple-purpose bombs were dropped
on cha lk y groun d ( a t Muensingen with a b out 380 lbs per square .
4"
and at Foggia with about 1 ,
980 lbs per square . 4 " pr essure resi s tance )
a nd wi t h a r r or - pi er c i ng bombs on g r an i t e ( a t I i a n da l wi t b a bo ut I
o ,
6u0 lbs per square
. + ") .
Durin these tests it was observed at
i
which
drop altitude tie respective bomb caqes that were
wi t h o» t f - es r e ma -
i ne d i nt a c t .
Th e t e s t s a l s o s e r v e d t o che c k t h e
explosive filler as to its shock resistance. I11 usLra tion 24 a
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