Siamo fortunati caro Gertro, sono riuscito a trovare una Ballistic Protection Data for helmets col sistema metrico decimale, e non feet/second, cosi' evitiamo di fare calcoli con le virgole :
Austrian
Spectra helmet 650m/s 2130


Canadian
Mk.II 270 m/s 885

Barrday Helmet (1988-91) 610 m/s 2000

CG634 helmet 634 m/s 2080

Chinese
GK-80A 380 m/s 1250 f/s Steel

GK-80B 310 m/s 1020 f/s Steel

Croatia
BK-3 550-650 m/s Aramid

BK-0 550-650 m/s Aramid

BKP 550-650 m/s Aramid

E. German
M-56 440 m/s 1440 f/s Steel

W. German
M-826 (17g) 610 m/s 2000 f/s

(9mm)390 m/s 1250 f/s





M-62 274.3 m/s 900 f/s

PASGT (German-made) (17g) 610 m/s 2000 f/s

(9mm) 390 m/s 1250 f/s


M-1 Style Composite (export) 490 m/s 1600 f/s

German Gefechtshelm 620m/s 2035

Israeli

Infantry Helmets

OR-201 485 1590 composite M1976

OR-403 550 1800 kevlar M1976

OR-404 610 2000 kevlar M1976

OR-800 610 2000 kevlar PASGT

OR-801 500 1650 composite

OR-1032 400 1300 fiberglass M1

OR-1820 445 1450 kevlar M1

Combat Vehicle Crewman Helmets
OR-601 365 1200 Composite U.S. 60's CVC

OR-602 430 1400 Kevlar Ear bulges

("Mickey Mouse")

R-603A 430 1400 Kevlar DH-132

OR-603 None Fiberglass DH-132

Police Helmets
OR-701 350 1150 Composite M1976 w/ visor

OR-702 460 1500 Kevlar M1976 w/ visor

Korea
Pagst-Style Variable Variable





M-1 Style Variable Variable

M-1 Style 800 f/s Carbon Steel / Liner ABS or NRP

Russia
6B6-1 650 m/s Titanium

6B6-3 700 m/s Titanium

6B6-3A 700 m/s Aluminium

6B6-4 650 m/s Titanium

6B7-M1 550 m/s Aramid

6B7-M2 550 m/s Aramid

PBSh-M3 520 m/s Steel

Vityaz-S 650 m/s Steel

Vityaz-SP 680 m/s Steel

SsH-68M 500 m/s Steel/Aramid

SCAT Ballistic Helmet (1.5 kg) NIJ II-A Metal(?)/ Aramid

SCAT Ballistic Helmet (2.9 kg) NIJ III-A Metal(?)/ Aramid

SCIF Ballistic Helmet (1.4 kg) NIJ II-A Metal(?)/ Aramid Packs

SCIF Ballistic Helmet (1.4 kg) NIJ III-A Metal(?)/ Aramid Packs

Slovakia
BK-600 620 m/s Aramid

Solvenia
Pap-Intel 850 m/s Aramid

Spain
M-85 I 500 m/s 1640 f/s


UK
UK Mk. 6 380-420m/s 1250-1375

US
M-1917 (230g/.45cal) 185 m/s 600 f/s

M-1 with Cotton Liner (17g) 320 m/s 1050 f/s
(230g/.45cal) 245 m/s 800 f/s

M-1 with Nylon Liner 400 m/s 1300 f/s

PASGT 610 m/s 2000 f/s

Taiwan
Ballistic Armourlyt 1135


Ne esistono ovviamente anche altri. Appena possibile.... PaoloM