Showing posts with label 75mm. Show all posts
Showing posts with label 75mm. Show all posts

Monday, 1 March 2021

Soviet Satellite Country Ammunition - Czechoslovakia (Part 6)

          








Examination of Czechoslovakian Ammunition Production/Inventory









Artillery Ammunition




 
The multiplicity of models and calibers of artillery weapons in the Czech Army in the past made an almost intolerable situation as regards ammunition supply, although ammunition for nearly all the available pieces is being produced in Czechoslovakia.  It is presumed that the artillery ammunition reserve stocks are approaching a safe level at present.

Projectiles manufactured in Czechoslovakia for the Czech Army are unpainted (color of machined metal).  On their surface are various stenciled markings which are usually in red.  A typical arrangement of the markings, reading from nose to base of the projectile, is as follows:


Vertical red line on shell body at junction with fuze --- Fuze index mark, for combination fuze

A group of 2 to 4 letters --- Relates to filler

Red band, around center of shell body --- Indicates a projectile fitted with a combination fuze

Letters and/or symbol --- Trademark and location of manufacturer

Letter and fraction or Roman numeral --- Lot number and year of manufacture



The meanings of some of the letters relating to projectile fillers have been determined as:


TP --- Bursting charge of Cast TNT and booster fitted with a safety device.

TTR --- Bursting charge of Pressed TNT and booster.

TTRP or TTP --- Bursting charge of Pressed TNT and booster with a safety device.


Cartridge cases bear stenciled and stamped markings on the base.  The stenciled markings are black and are arranged in a curved line along the rim.  Typical stenciled markings, and their meanings, might be:


14 x 4.3/970-mm  --- Size of propellant in mm.

Vz 38 trp --- Type of propellent

S 1/36 --- Series and year of manufacture


The stamped markings are arranged in straight lines on the base of the case.  An example of the stampings on a case might be:


a symbol --- Trademark of firm

1920 --- Year of manufacture

3 --- Lot of series

21 cm Vz 16 --- Using weapon



Detailed information on Czech artillery ammunition packaging is not available.  It is known that both wooden and metal packing boxes of conventional construction are used.  Czech packing may be expected to be of approximately equal quality with that of the larger industrial nations.  Identifying markings apparently are stenciled on the boxes, but details of their arrangement and precise meaning are not found.








75mm Complete Round, Fixed, HE, OCG Model ?
(7.5-cm OCG Vz. ?)


This high-explosive round is fired from the Czech 75-mm anti-aircraft gun M1932 (Skoda) with a time fuze of a model as yet unidentified.  The M1932 (Skoda) is to be found also in the Albanian and Rumanian Armies.  Czech ammunition for the weapon, therefore, may be encountered in these two Satellite countries.

The steel projectile is unpainted, with red markings.  A red band around the center of the projectile indicates the use of a combination fuze.  The groove between the two rotating bands is packed with a heavy grease.  The cartridge case is made of brass; stamped and stenciled markings appear on the base of the cartridge case.



Characteristics
Caliber: 75mm (2.95 in)
Weight of complete round: 11.87kg (26.38 lb)
Weight of projectile, as fired: ? kg (? lb)
Weight of propellant, w/o igniter: ? kg (? lb)
Type of projectile filler: Cast TNT
Weight of projectile filler: ? kg (? lb)



Packaging

No photo available

Information on packaging of this round is not available.








75mm Complete Round, Semi-Fixed, HE, OCG Model 14/14a
(7.5-cm OCG Vz. 14/14a)

No photo available

 This round, for the Czech 75-mm mountain howitzer M15, is known to exist, and its Czech nomenclature indicates that it uses a combination fuze, but further data on the round is not available.



Characteristics
Caliber: 75mm (2.95 in)
Weight of complete round: ? kg (? lb)
Weight of projectile, as fired: ? kg (? lb)
Weight of propellant, w/o igniter: ? kg (? lb)
Type of projectile filler: ?
Weight of projectile filler: ? kg (? lb)


Packaging

No photo available

Information on packaging of this round is not available.







76.5mm Complete Round, Fixed, HE, OCG Model ?
(7.65-cm OCG Vz. ?)


This high-explosive round is fired from the Czech 76.5mm anti-aircraft gun model 1928.  This weapon is also used by Bulgaria, and accordingly Czech-manufactured ammunition for the weapon may be encountered in Bulgaria.  The round uses a combination fuze of an unidentified model.

The steel projectile is unpainted, with red markings.  A red band around the center of the projectile indicates the use of a combination fuze.  The cartridge case is made of brass.  It is believed that propellent and manufacturing data are stamped and stenciled on the cartridge case base, in accordance with the practice commonly followed for other Czech artillery rounds.



Characteristics
Caliber: 76.5mm (3.19 in)
Weight of complete round: ? kg (? lb)
Weight of projectile, as fired: ? kg (? lb)
Weight of propellant, w/o igniter: ? kg (? lb)
Type of projectile filler: ?
Weight of projectile filler: ? kg (? lb)



Packaging

No photo available

Information on packaging of this round is not available.







Next Time: Soviet Satellite Country Ammunition - Czechoslovakia (Part 7)

Source: Original US-supplied Canadian Manual on Soviet & Soviet Satellite Explosives (No. 30-14-2)

Monday, 22 May 2017

German Projectiles - 75mm Projectiles







German Projectiles










H.E. Projectile Type 34, 75mm


German Designation: Sprgr. Patr. KwK (34) (Sprenggranate Patrone Kampfwagenkanone 34)

Employment: 7.5cm KwK (Kampfwagenkanone)
                 7.5cm Stu.G. (Sturm Geschutz)
                                 7.5cm KwK 40 (Kampfwagenkanone 40)
                           7.5cm Stu.G. 40 (Sturm Geschutz 40)
                               7.5cm Pak 40 (Panzerabwehrkanone 40)
                               7.5cm Geb G. 36 (Gebirgs Geschutz 36)
                           7.5cm L.G. 40 (Leichte Geschutz 40)
                                     7.5cm L.F.K. 18 (Leichte Feld Kanone 18)



Dimensions

Overall length w/ fuze (complete round): 13.5 inches
Overall length w/o fuze (complete round): 11.6 inches
Distance from base to band: 2.187 inches
Width of bimetallic rotating band: 0.7 inches
Diameter of projectile base: 2.5 inches
Total weight (complete round): 12.6 pounds
Weight of bursting charge: 30 ounces

Type of Bursting Charge: Amatol 40/60 + smoke box of red phosphorous
(TNT/Amatol 90/10 when used for Geb.G.36)
No tracer

Overall length (cartridge case): 9.56 inches
Diameter at case neck: 2.93 inches
Diameter at case shoulder: 3.01 inches
Diameter at base: 3.6 inches
Weight of propellant: 12.25 ounces
Type of propellant: Tubular Nitrocellulose

Fuze: Nose percussion fuze K1 AZ 23

Markings: Painted Green

Packaging: Two rounds to a metal container - 46.64 pounds







A.P. Projectile with Ballistic Cap and Piercing Cap, Type 39, 75mm


German Designation: Pzgr. Patr. 39 KwK 40 (Panzergranate Patrone 39 Kampfwagenkanone 40)

Employment: 7.5cm KwK 40 (Kampfwagenkanone 40)
                 7.5cm Stu.G. 40 (Sturm Geschutz 40)
                     7.5cm Pak 40 (Panzerabwehrkanone 40)

Dimensions

Overall length (complete round): 29.3 inches
Overall length w/o tracer (projectile): 9.625 inches
Distance from base to band: 0.98 inches
Width of bimetallic rotating band: 0.67 inches
Diameter of projectile base: 2.94 inches
Total weight (complete round): 29.4 pounds

Type of bursting charge: Cyclonite
Tracer present

Overall length (cartridge case): 19.4 inches
Diameter at case mouth: 3.15 inches
Diameter at case shoulder: 3.8 inches
Diameter at case base: 4 inches
Weight of propellant: 5.35 pounds
Type of propellant: Tubular Diglycol

Fuze: Bd. Z. 5103

Markings: Painted black with red band and red stencilling

Packaging: Two rounds to a metal container


Remarks: The bursting charge is in an aluminum container which is a tight fit in the projectile cavity.  This projectile may or may not have a cannelure on the cap.

A round exists for the Pak 40 designated "Pzgr. Patr. 40 Pak 40", which is an A.P. projectile with a tungsten carbide core.  It has a reported weight of 7.06 pounds.









Hollow Charge Projectile, Type 39, 75mm


German Designation: 7.5cm Gr. 39 (Granate 39)

Employment: Geb. K. 15 (Gebirgs Kanone 15)


Dimensions

Overall length (complete round): 14.68 inches
Overall length w/ fuze (projectile): 11.181 inches
Width of bimetallic rotating band: 0.43 inches
Diameter of projectile base: 2.95 inches
Distance from base to band: 0.7 inches
Total weight (projectile): 9.9 pounds

Type of Bursting Charge: Cyclonite/Wax/TNT
No tracer

Overall length (cartridge case): 5.078 inches
Diameter at case mouth: 3.03 inches
Diameter at case base: 3.34 inches
Weight of propellant: 11.6 ounces
Type of propellant: Flaked Nitroglycerine and Nitrocellulose with Nitroguanadine

Fuze: Nose percussion fuze A.Z. 38

Packaging: Three shells and three cases in a wicker basket.

Markings: Painted green


Remarks: When fired, the projectile will be found with 28 grooves in the band.







Hollow Charge Projectile for Tank Gun, 75mm


German Designation: 7.5cm Gr. Patr. 38 KwK (H.L.) (Granate Patron 38 Kampfwagenkanone (Hohl Ladung) )

Employment: 7.5cm KwK (Kampfwagenkanone)
                 7.5cm Stu.G. (Sturm Geschutz)
                                 7.5cm KwK 40 (Kampfwagenkanone 40)
                           7.5cm Stu.G. 40 (Sturm Geschutz 40)
                               7.5cm Geb G. 36 (Gebirgs Geschutz 36)
                            7.5cm L.G. 40 (Leichte Geschutz 40)
                                     7.5cm L.F.K. 18 (Leichte Feld Kanone 18)


Dimensions

Overall length (complete round): 18.5 inches
Overall length w/ fuze (projectile): 11.2 inches
Width of bimetallic rotating band: 0.66 inches
Diameter of projectile base: 2.55 inches
Distance from base to band: 2.2 inches
Total weight (complete round): 12 pounds, 14 ounces
Total weight (projectile): 9.75 pounds
Weight of bursting charge: 1.22 pounds

Type of Bursting Charge: Cyclonite/Wax/TNT
No tracer

Overall length (cartridge case): 9.56 inches
Diameter at case neck: 2.93 inches
Diameter at case shoulder: 3.01 inches
Diameter at case rim: 3.6 inches
Weight of case: 2 pounds, 1.79 ounces
Weight of propellant: 12.61 ounces
Type of propellant: Tubular Nitrocellulose

Fuze: Nose percussion fuze A.Z. 38

Packaging: Two rounds to a metal container

Markings: Painted green


Remarks: Hollow charge projectiles are made in two pieces, the male nose being threaded into the body.  There are two spanner flats on the nose piece.





Hollow Charge Projectile for Tank Gun, Type B, 75mm


German Designation: 7.5cm Gr. Patr. 38 KwK (H.L./B) (Granate Patron 38 Kampfwagenkanone (Hohl Ladung/B) )

Employment: 7.5cm KwK (Kampfwagenkanone)
                 7.5cm Stu.G. (Sturm Geschutz)
                                 7.5cm KwK 40 (Kampfwagenkanone 40)
                           7.5cm Stu.G. 40 (Sturm Geschutz 40)
                               7.5cm Geb G. 36 (Gebirgs Geschutz 36)
                           7.5cm L.G. 40 (Leichte Geschutz 40)
                                     7.5cm L.F.K. 18 (Leichte Feld Kanone 18)
                               7.5cm Pak 40 (Panzerabwehrkanone 40)


Dimensions

Overall length w/ fuze (complete round): 19.36 inches
Overall length w/ fuze (projectile): 12 inches
Width of rotating band: 0.63 inches
Diameter of projectile base: 2.48 inches
Distance from base to band: 2.2 inches

Type of Bursting Charge: Cyclonite/Wax/TNT
No tracer

Overall length (cartridge case): 9.56 inches
Diameter at case neck: 2.93 inches
Diameter at case shoulder: 3.01 inches
Diameter at case rim: 3.6 inches
Weight of case: 2 pounds, 1.79 ounces
Weight of propellant: 12.61 ounces
Type of propellant: Tubular Nitrocellulose

Fuze: Nose percussion fuze A.Z. 38

Packaging: Two rounds to a metal container

Markings: Painted green.
"HL/B" stencilled in black on nose.


Remarks: Hollow charge projectiles are made in two pieces, the male nose being threaded into the body.  There are two spanner flats on the nose piece.






Smoke Projectile for Tank Gun, 75mm


German Designation: 7.5cm Nbgr. Patr. KwK (Nebelgranate Patrone Kampfwagenkanone)

Employment: 7.5cm KwK (Kampfwagenkanone)
                 7.5cm Stu.G. (Sturm Geschutz)
                                 7.5cm KwK 40 (Kampfwagenkanone 40)
                           7.5cm Stu.G. 40 (Sturm Geschutz 40)
                           7.5cm L.G. 40 (Leichte Geschutz 40)
                                     7.5cm L.F.K. 18 (Leichte Feld Kanone 18)


Dimensions

Overall length (complete round): 20.9 inches
Overall length w/ fuze (projectile): 13.5 inches
Overall length w/o fuze (projectile): 11.6 inches
Diameter at base: 2.5 inches
Distance from base to band: 2.187 inches
Width of rotating band: 0.67 inches
Total weight (projectile): 13.6 pounds
Weight of bursting charge: 2 ounces

Type of bursting charge: 80/20 Oleum impregnated in pumice, smoke mixture.
No tracer

Overall length (cartridge case): 9.56 inches
Diameter at case neck: 2.93 inches
Diameter at case shoulder: 3.01 inches
Diameter at case rim: 3.6 inches
Weight of cartridge case: 2.1 pounds, 1.79 ounces
Type of propellant: Tubular Nitrocellulose
Weight of propellant: 12.61 pounds

Fuze: Nose percussion fuze K1 A.Z. 23 Nb

Packaging: Two rounds to a metal container


Markings: Painted green
"Nb" stencilled on body in white.


Remarks: This projectile is machined to the same design as the H.E. Projectile, Type 34, with the exception of a recess one inch in diameter, 0.08 inch in depth provided at the base of the cavity for seating lower end of the burster tube.  There is a threaded plug in the side wall used to close the filling hole.





A.P.C. Tank Gun Projectile, 75mm


German Designation:  Pzgr. Patr. KwK (Panzergranate Patrone Kampfwagenkanone)

Employment: 7.5cm KwK (Kampfwagenkanone)
                 7.5cm Stu.G. (Sturm Geschutz)
                           7.5cm L.G. 40 (Leichte Geschutz 40)
                                     7.5cm L.F.K. 18 (Leichte Feld Kanone 18)


Dimensions

Overall length (complete round): 19.89 inches
Overall length w/o tracer (projectile): 11.312 inches
Diameter at base: 2.93 inches
Distance from base to band: 0.98 inches
Width of bimetallic rotating band: 0.67 inches
Total weight (projectile): 15.4 pounds
Weight of bursting charge: 2.92 pounds

Type of bursting charge: TNT and PETN/Wax
Tracer present

Overall length (cartridge case): 9.56 inches
Diameter at case neck: 2.93 inches
Diameter at case shoulder: 3.01 inches
Diameter at case rim: 3.6 inches
Type of propellant: Tubular Nitrocellulose
Weight of propellant: 12.39 pounds

Fuze: Bd. Z.f. 7.5cm

Packaging: Two rounds to a metal container


Markings: Painted black.
"6354 7.5cm KwK" stamped on cartridge case.


Remarks: There are two cannelures below the rotating band.








H.E. Projectile for Mountain Gun, 75mm


German Designation:  Geb. Gr. 15 Al. (Gebirgs Granate 15 Aluminum)

Employment: 7.5cm Geb. K. 15 (Gebirgs Kanone 15)


Dimensions

Overall length (complete round): 15.75 inches
Overall length w/ fuze (projectile): 12.99 inches
Diameter at base: 2.95 inches
Distance from base to band: 0.687 inches
Width of rotating band: 0.433 inches
Total weight (projectile): 12 pounds

Type of bursting charge: TNT/Aluminum, 90/10 and red phosphorus smoke box
No tracer

Overall length (cartridge case): 5.078 inches
Diameter at case neck: 3.03 inches
Diameter at case rim: 3.34 inches
Type of propellant: Flaked Nitroglycerine and Nitrocellulose with Nitroguanadine.
Weight of propellant: 11.6 ounces

Fuze: Nose percussion fuze A.Z. 23 Geb.
Time and percussion fuze Dopp Z. a/60 Geb.

Packaging: Three shells and three cases in a wicker basket


Markings: Painted green.


Remarks: There is a round designated "Geb. Gr. 15 rot" which is identical with the above except that it does not contain any aluminum.







Hollow Charge Projectile for Infantry Gun, 75mm


German Designation: 7.5cm Igr. 38 (Iager 38)

Employment: 7.5cm L.I.G. 18 (Leichte Infanterie Geschutz 40)
                                             7.5cm L. Geb. I.G 18 (Leichte Gebirgs Infanterie Geschutz 18)


Dimensions

Overall length (complete round): 11.562 inches
Overall length w/o fuze (projectile): 9.134 inches
Width of bimetallic rotating band: 0.236 inches
Diameter of projectile base: 2.875 inches
Distance from base to band: 1.125 inches
Weight of bursting charge: 6 pounds, 10 ounces

Type of Bursting Charge: Cyclonite
No tracer

Overall length (cartridge case): 3.5 inches
Diameter at case mouth: 3 inches
Diameter at case base: 3.375 inches
Weight of propellant: 2.52 ounces
Type of propellant: Nitroglycerine disc powder

Fuze: Nose percussion fuze A.Z. 38

Packaging: Three projectiles and three complete charges in a wicker basket

Markings: Painted green.






H.E. Projectile for Infantry Gun, 75mm


German Designation: Igr. 38 A.Z. 23nA (Iager 38 Aufachlag Zunder neu Abetilung)

Employment: 7.5cm L.I.G. 18 (Leichte Infanterie Geschutz 40)
                                             7.5cm L. Geb. I.G 18 (Leichte Gebirgs Infanterie Geschutz 18)


Dimensions

Overall length (complete round): 15.49 inches
Overall length w/ fuze (projectile): 12.99 inches
Width of rotating band: 0.236 inches
Diameter of projectile base: 2.95 inches
Distance from base to band: 1.102 inches
Total weight (complete round): 13 pounds, 10 ounces
Weight of bursting charge: 1.21 pounds

Type of Bursting Charge: Amatol 40/60
No tracer

Overall length (cartridge case): 3.5 inches
Diameter at case mouth: 3 inches
Diameter at case base: 3.375 inches
Weight of propellant: 2.52 ounces
Type of propellant: Nitroglycerine disc powder

Fuze: Nose percussion fuze L. Igr. Z. 23nA

Packaging: Three shells and three cartridges in a wicker basket with metal bottom and metal cradle - 49 pounds.

Markings: Painted green.
"7.5cm Igr. 18, L. Igr. Z 23nA" stencilled on projectile.


Remarks: This projectile is sometimes filled with TNT/Amatol - 90/10

When this projectile has been fired from the L.I.G. 19, the rotating band will show 24 riflings.








A.P. Projectile with Tungsten Core (Arrowhead), 75mm


German Designation: Pzgr. Patr. 41 (Panzergranate Patrone 41)

Employment: Pak 41 (Panzerabwehrkanone 41)


Dimensions

Overall length (complete round): 29.8 inches
Total weight (complete round): 16.65 pounds
Total weight (projectile): 5.68 pounds
Weight of bursting charge: 1.21 pounds

Diameter of tungsten core: 1.16 inches
Tracer present

Weight of propellant: 5.43 pounds
Type of propellant: Tubular Diglycol

Fuze: None
Markings: Painted black


Remarks: Data on this projectile from captured document, not live specimen.










H.E. Projectile for Dual-Purpose Skoda Gun, 75mm


German Designation: Sprgr. Patr. 75/50 (Sprenggranate Patrone 75/50)

Employment: 75/50 Skoda Dual-Purpose Gun


Dimensions

Overall length w/ fuze (projectile): 14.96 inches
Diameter of bourrelet: 2.948 inches
Width of bourrelet: 0.511 inches
Width of rotating bands: 0.472 inches
Total weight (complete round): 27.5 pounds
Weight of bursting charge: 1.21 pounds

Type of Bursting Charge: TNT
No tracer

Overall length (cartridge case): 22.83 inches
Diameter at case neck: 3.15 inches
Diameter at case shoulder: 3.228 inches
Diameter at case rim: 3.74 inches
Weight of propellant: 4.201 ounces
Type of propellant: Tubular propellant

Fuze: Time fuze of combustion type is fitted.  A brass gaine attached to fuze in distinction from German system contains detonator.


Markings: Red banded, stencilled in red.
"1941 38 75AA" stamped on base.


Remarks: This projectile is the most common of a number of types seizes by the Germans for use in captured French 75/50 Dual-Purpose Guns, of which one authority estimates there may be 20,000 pieces on the Continent.







Next Time: 76.2mm Projectiles

Monday, 5 September 2016

Italian Explosive Ordnance - 75mm Projectiles (Part 2)








Italian Explosive Ordnance

  



75mm AA


Guns used in: 75/27mm Anti-Aircraft Gun
Fuzing: Nose Time Fuze MO6/17

Overall length of round: Unknown
Diameter at base: Unknown
Distance base to band: Unknown
Width of band: Unknown
Diameter at bourrelet: Unknown

Type of filling: TNT
Weight of filling: 0.123 kilograms
Weight of loaded projectile: 6.381 kilograms
Length of complete round: 517mm
Weight of complete round: 8.32kg

Propellent charge:
-0.57kg Ballistite, or
-0.56kg C2 Powder





75mm AP


Guns used in: 75/18mm SPAG, 75/13mm Mountain Howitzer
Fuzing: Base Fuze MO9/41 p.c.

Overall length of round (w/o fuze): 330 mm
Diameter at base: Unknown
Distance base to band: 49.7 mm
Width of band: 9.7 mm
Diameter at bourrelet: 74.74 mm

Type of filling: TNT
Weight of filling: 0.265 kilograms
Weight of loaded projectile: 6.42 kilograms
Length of round (fixed): 572.8mm
Weight of round (fixed): 8.08kg
Propellent charge (fixed): 0.42kg Ballistite
Booster: No. 5 M38

Remarks: The projectile is fitted with piercing and ballistic caps.  The cartridge case for 75/18mm fixed round is made of steel.




  


75/27mm AP


Guns used in: 75/18mm SPAG, and 75/27mm Field Gun
Fuzing: Base Fuze MO9/41

Overall length: 307 mm
Diameter at base: Unknown
Distance base to band: 50 mm
Width of band: 9.7 mm
Diameter at bourrelet: 74.74 mm

Type of filling: Probably TNT
Weight of filling: 0.27 kg
Weight of loaded projectile: 6.2 kg
Length of round (fixed): 75/18 - 589.5 mm
Weight of round (fixed): 7.88 kg

Propellent charge (fixed): 0.42kg Ballistite







75/32mm AP


Guns used in: 75/34mm SPAG, 75/32mm Field Gun
Fuzing: Base Fuze MO9/41

Overall length: 307 mm
Diameter at base: Unknown
Distance base to band: 50 mm
Width of band: 15 mm
Diameter at bourrelet: 74.74 mm

Type of filling: Probably TNT
Weight of filling: Unknown
Length of round (fixed): 591.1 mm
Weight of round (fixed): 8.59 kg
Propellent charge (fixed): 0.85 kg F.B1 Powder

Remarks: Projectile differs very slightly from 75mm AP Type 1 and Type 2.








75mm EP (Hollow Charge)


Guns used in: 75/18mm SPAG, 75/18mm Mountain Howitzer
Fuzing: Base Fuze E.P. M36

Overall length (w/ nose cap): 254 mm
Overall length (w/o nose cap): 208 mm
Diameter at base: Unknown
Distance base to band: 58 mm
Diameter at bourrelet: 74.74 mm
Width of band: 9.7 mm

Type of filling: Unknown
Weight of filling: Unknown
Weight of loaded projectile: 4.5 kg
Length of round (fixed): 428.5 mm
Weight of round (fixed): 5.87 kg
Propellent charge (fixed): 0.249kg Ballistite

Remarks: The semifixed round uses the cartridge case for the 75/18mm Howitzer.  The cartridge case for the fixed round is made of steel.







75mm EPS (Hollow Charge)


Guns used in: 75/13, 75/18, 75/27, 75/32mm Guns, and 75mm SPAGs
Fuzing: Base Fuze I.E.P.M.

Overall length (w/ fuze): 310 mm
Overall length (w/o fuze): 302 mm
Diameter at base: Unknown
Distance base to band: 58 mm
Width of band: 9.7 mm
Diameter at bourrelet: 74.74 mm

Type of filling: Unknown
Weight of filling: Unknown

Total length of round:
-75/13mm: 484.5 mm
-75/18mm: 578.1 mm

Weight of complete round:
-75/13mm: 6.57 kg
-75/18mm: 7.37 kg

Weight of propellant:
-75/13mm: 0.249 kg
-75/18mm: 0.69 kg







75/13mm EP (Hollow Charge)


Guns used in: 75/18mm SPAG, 75/18mm Mountain Howitzer
Fuzing: Base Fuze E.P. M41

Overall length: 307 mm
Diameter at base: Unknown
Distance base to band: 58 mm
Width of bands: 9.7 mm
Diameter at bourrelet: 74.74 mm

Type of filling: Probably TNT
Weight of filling: Unknown
Length of round (fixed): 483 mm
Weight of round (fixed): 6.579 kg
Weight of loaded projectile: 5.2 kg
Propellent charge (fixed): 0.249 kg Ballistite

Remarks: The fixed cartridge case is made of steel.  The projectile has a nose cap which is 83.5mm long.






75mm EPS M42 (Hollow Charge)


Guns used in: 75/18mm and 75/34mm SPAGs, 75/27mm Field Gun
Fuzing: Nose Fuze E.P.S. M42

Overall length (w/ fuze): 310 mm
Overall length (w/o fuze): 298 mm
Diameter at base: Unknown
Distance base to band: 58 mm

Width of bands: 9.7 mm
Diameter at bourrelet: 74.74 mm

Type of filling: Probably TNT
Weight of filling: Unknown
Weight of loaded projectile: 5.3 kg

Length of round (fixed):
-75/18mm: 484.5 mm
-75/34mm: 586.1 mm

Propellent charge (fixed):
-75/18mm: 0.249 kg Ballistite
-75/34mm: 0.69 kg F.B1 Powder

Weight of round (fixed):
-75/18mm: 6.67 kg
-75/34mm: 7.47 kg

Remarks: The cartridge case in the fixed type of ammunition (75/18mm) is made of steel.  The projectile has a 74mm cap, which is hollow.






75mm Incendiary (F/C and F.1/C)


Guns used in: 75mm Infantry Gun
Fuzing: Nose Percussion Fuze I. M35 p.c. / I. M38 p.c.

Overall length w/o fuze (F/C): 266 mm
Overall length w/o fuze (F.1/C): 276.7 mm
Diameter at base: 74.2
Distance base to band: 38 mm
Width of bands: 10 mm
Diameter at bourrelet:
-(F/C): 74.5 mm
-(F.1/C): 74.6 mm

Type of filling (F.1/C): Phosphorus
Weight of filling (F.1/C): 0.7 kg
Weight of loaded projectile:
-(F/C): 6.3 or 6.4 kg
-(F.1/C): 5.265 kg

Remarks: These two projectiles are similar except for weight and type of incendiary filling.







Next Time: Italian 76mm to 90mm Projectiles

Monday, 29 August 2016

Italian Explosive Ordnance - 75mm Projectiles (Part 1)







Italian Explosive Ordnance

  



75/13mm HE



Guns used in: 75/13mm Mountain Gun
Fuzing: Nose Percussion Fuze M10 I.M35 p.c., I.M38 p.c, or I.M40 p.c.

Overall length of round: 266 mm
Diameter at base: 74.2 mm
Distance base to band: Unknown
Width of band: Unknown
Diameter at bourrelet: 74.6 mm

Type of filling: MNDT or TNT
Weight of filling: 0.37 kilograms
Weight of loaded projectile: 6.37 kilograms







75/13mm HE (Light Case)
 
 

Guns used in: 75/13mm Field Gun
Fuzing: Nose Percussion Fuze M (Guerritore) or M10

Overall length of round (w/o fuze): 276.7 mm
Diameter at base: 74.2 mm
Distance base to band: 38 mm
Width of band: 12 mm
Diameter at bourrelet: 74.6 mm

Type of filling: MDNT or TNT
Weight of filling: 0.53 kilograms
Weight of loaded projectile: 5.1 kilograms

Booster used: No. 1 M38

  


75/13mm HE M32
 
 

Guns used in: 75/18mm and 75/34mm SPAG, and 75/27mm Field Gun
Fuzing: Nose Percussion Fuze M10

Overall length (w/ fuze): 319 mm
Overall length (w/o fuze): 305 mm
Diameter at base: 64.4 mm
Distance base to band: 58 mm
Width of band: 9.7 mm
Diameter at bourrelet: 74.74 mm
Weight of filling: 0.6 kg
Weight of loaded projectile: 6.35 kg


Total length of round:
75/18 - 479.1 mm
75/34 - 580.7 mm

Weight of complete round:
75/18 - 7.725 kg
75/34 - 8.52 kg

Weight of propellent charge:
75/18 - 0.42kg Ballistite
75/34 - 0.69kg F.B1 Powder









75/27mm HE M32




Guns used in: 75/18mm SPAG, 75/13mm Mountain Gun
Fuzing: Nose Percussion Fuze M10 or I.O. M40 p.c.

Overall length (w/ fuze): 319 mm
Overall length (w/o fuze): 305mm
Diameter at base: Unknown
Distance base to band: 46 mm
Width of band: 9.7 mm
Diameter at bourrelet: 74.74 mm

Type of filling: TNT
Weight of filling: 0.6 kg
Weight of loaded projectile: 6.35 kg
Total length of round: 591.5 mm
Weight of complete round: 7.725 kg
Weight of propellent charge: 0.42 kg Ballistite







75/32mm HE




Guns used in: 75/34mm SPAG, 75/32mm Field Gun
Fuzing: Nose Fuze I.O. M. 36/40 or Nose Fuze A.D.E. M36

Overall length: 351 mm
Diameter at base: 65.2 mm
Distance base to band: 53 mm
Diameter at bourrelet: 74.74 mm
Width of band: 15 mm

Type of filling: Probably TNT
Weight of filling: Unknown
Weight of loaded projectile: 6.35 kg

Remarks: The same projectile is used in fixed or semi-fixed type ammunition.  The cartridge case used for fixed round for the 75/34mm gun is 632.1 mm long and weighs 8.42 kg.  The propellent consists of I.B.I. powder weighing 0.69 kg.






75/32mm A.D.E. HE




Guns used in: 75/32mm Field Gun
Fuzing: Nose Fuze A.D.E. M36

Overall length (w/ fuze): 368 mm
Overall length (w/o fuze): 273 mm
Diameter at base: 65.2 mm
Distance base to band: 42 mm
Width of band: 14 mm
Diameter at bourrelet: 74.74 mm

Type of filling: Unknown
Weight of filling: 0.5 kg
Weight of loaded projectile: 6.3 kg
Cartridge case: Type for 75/32mm gun

Remarks: The projectile is called a double-purpose type by the Italians and Germans.  It can be set for serial burst or impact.





75/46mm HE M34



Guns used in: 75/46mm Anti-Aircraft Gun
Fuzing: Nose Fuze M.T. for 75/46, M.T. 36 or Time M36

Overall length: Unknown
Diameter at base: Unknown
Distance base to band: Unknown

Width of bands:
1st Band: 15 mm
2nd Band: 16 mm

Diameter at bourrelet: 74.75 mm

Type of filling: TNT
Weight of filling: 0.33 kg
Weight of loaded projectile: 6.5 kg
Booster: No. 5 M38

Remarks: The projectile has double rotation band with a space of 10 mm between them.  The complete rounds weigh 10.645 kg and are 866.7 mm long.  The propelling charge is C2 weighing 1.47 kg.







75/46mm HE M36




Guns used in: 75/46mm Anti-Aircraft Gun
Fuzing: Nose Fuze A.D.E. M36

Overall length: Unknown
Diameter at base: Unknown
Distance base to band: Unknown

Width of bands:
1st Band: 15 mm
2nd Band: 16 mm
 
Diameter at bourrelet: 74.75 mm

Type of filling: TNT
Weight of filling: 0.345 kg
Weight of loaded projectile: 6.355 kg
Length of complete round: 880.4 mm
Length of cartridge case: 582.7 mm

Type of propellant:
-1.07 kg C2 Powder, or
-1.945 kg N.A.C. Powder, or
-1.605 kg M.B. Powder, or
-1.685 kg F.C4 Powder, or
-1.617 kg F.B1 Powder

Remarks: Double rotating band 10 mm apart.  Projectile almost identical to 75 HE M34.

 



Next Time: Italian 75mm Projectiles (Part 2)

Tuesday, 23 June 2015

Imperial Japanese Army Ammunition - 7cm (75mm) Projectiles


Introduction to Army 7cm (75mm) Ammunition 

 

There were ten or more 75mm guns in use in the Japanese Army. Though the weapons vary considerably in design, length of bore, and employment, the bore diameter (75mm) is held constant and in large part the projectiles are designed to be interchangeable for numerous guns. In this way, identical projectiles may be assembled with different sizes of case and propellant charges to fit the various weapons.

For this reason the cases and propellant charges for the different weapons will be treated separately and the projectiles will be presented as a group of designs which are potentially interchangeable for all Army 75mm guns. The specific purpose of a given projectile or a given gun will limit the occurrence of many of the possible combinations.

Ammunition for Japanese Navy guns designated "8cm" is comparable in size to Army 7cm, but the Navy guns have a bore diameter of 3 inches (76.2mm) and Army and Navy projectiles and ammunition are not interchangeable. Navy guns as well as Army guns are found commonly in shore defenses, but the identity of the installations, weapons, and ammunition remains distinctly Army or Navy.





*: For convenience in reference, this group, in which the propellant cse bears the multiple designation for four weapons, will be termed "Type 38 Field Gun Group"
















KEY: Blank signifies that the indicated combination of projectile and propellant case has neither been recovered nor found listed in Japanese documents. "No Data" indicates that this combination is listed in documents or has been recovered, but that no information on the propellant is available.


7cm (75mm) H.E.A.A. Projectile





Note - The drawing given here is based on a Japanese drawing labelled only "Circular-layered projectile". The projectile is of apparent 75mm size and the body appears to be made up of numerous steel rings bolted together with several bolts which are grooved at intervals to produce better fragmentation.

This projectile is believed to be the same referred to in other documents as "H.E.A.A. Projectile" for the Type 11th year field A.A. gun. The following applies only if this presumption is correct.

Weight of projectile, filled and fuzed: 6.60kg
Filling: "ONA", a mixture of picric acid and dinitronaphtalene
Fuzing: Type 10th year A.A. powder time fuze

Used in: Type 11th year field A.A. gun


Type 90 7cm (75mm) H.E.A.A. Long Pointed Projectile





Weight of projectile, filled (TNT): 6.53kg
Weight of filled: 0.385kg
Filling:
-Standard: TNT cast directly into lacquered cavity (Recovered)
-Alternate: Picric acid (Documentary evidence)
Diameter at bourrelet: 75mm
Length overall (w/o fuze): 257mm
Length of projectile from case: 202mm
Width of forward rotating band: 9.5mm
Width of after rotating band: 9.5mm
Width of space between rotating bands: 6.5mm
Width of copper bourrelet: 14mm
Distance from base to after edge of bourrelet: 140mm

Fuzing: Type 89 long pointed powder time fuze in nose. An auxiliary fuze armed by setback and centrifugal force is used immediately below the time fuze



Type 90 7cm (75mm) H.E. Long Pointed Projectile





Weight of projectile, filled (w/o fuze) (TNT): 6.17kg
Weight of filling: 0.49kg
Filling:
-Standard: TNT cast directly into a lacquered cavity (documentary)
-Alternate: "HEINEI" trinitrophenetole (recovered)
Indicated by painted on body

Diameter at bourrelet: 75mm
Length overal (w/o fuze): 317.5mm
Length protruding from case: 267mm
Width of rotating bands:
-Upper: 10.6mm
-Lower: 9.6mm

Fuzing: Type 88 instantaneous (Gun), Type 88 delay (Gun)

Operation and employment:
It is believed this projectile was designed primarily to adapt the Type 88, 75mm high velocity A.A. gun to a dual-purpose field gun (IE: for air and ground targets). The ballistic form of this projectile approximates that of the Type 90 long pointed A.A. projectile, when the A.A. time fuze is installed. The projectile is also used for other weapons as listed below.

Used in:
-Type 88 field A.A. (Special), case 19 and 3/16 inches
-Type 38 field gun group (four weapons), case 11 and 9/16 inches
-Type 90 field gun, case 16 and 11/16 inches
-Type 94 mountain gun

Remarks:
When this projectile is cased for use in the Type 88 field A.A. gun (special), a reduced propelling charge is used. This reduced charge is indicated by a Roman numeral II stenciled on the case.



Type 94 7cm (75mm) High Explosive Projectile





Weight of projectile, filled (TNT): 6.02kg
Weight of filling: 0.81kg
Filling:
-Standard: TNT cast directly into lacquered cavity
-Alternate (1): "ANGA" ammonium nitrate, RDX
-Alternate (2): "HEINEI" trinitrophenetole

Diameter at bourrelet: 75mm
Length overall (w/o fuze): 303mm
Length protruding from case: 264mm
Width of rotating band: 10mm

Fuzing: Type 88 instantaneous fuze (Gun), Type 88 short delay nose fuze (Gun)

Used in:
-Type 41 mountain gun (regimental gun), case 7 and 1/4 inches
-Type 94 mountain gun, case 11 and 3/16 inches
-Type 38 field gun group, case 11 and 9/16 inches
-Type 88 field A.A. gun, case 19 and 9/16 inches
-Type 88 field A.A. (special) gun, case 19 and 9/16 inches
-Type 90 field gun, case 16 and 11/16 inches

Remarks:
Two other designs essentially the same as Type 94 are known:
 1. H.E. Type 10 year.
 2. H.E. Type 90.
These have the same overall length as the Type 94, and have the same external form and general construction except for the following features.

1. The explosive cavity does not taper in the base as in the Type 94, but is straight-sided.
2. The slight boat tail present on the Type 94 is absent in the other designs.
3. Below the rotating band in the Type 10 year designs only, there is an annular groove into which the case is crimped.


Next Time: More 75mm Projectiles