Monday 2 October 2017

American Projectiles and Explosives - 5-inch Projectiles (Part 2)







American Projectiles and Explosives



5-inch Projectiles





5-inch A.A. Common Mk 28 Mod 9 (Obsolete)


Guns used in: 5"/25
Overall length w/ nose fuze: 20.7 inches
Overall length w/o nose fuze: 16.945 inches
Diameter of base: 4.973 inches
Distance base to band: 2.43 inches
Width of band: 2 inches
Diameter at bourrelet: 4.985 inches

Filling: Explosive D, Composition A
Weight of filling: 7.33 pounds
Weight of loaded projectile: 51.7 pounds
Charge/Weight ratio: 14%

Cartridge case: Mk 4
Primer: Mk 13 and all Mods
Tracer: None
Fuzes: Mk 32 all Mods (V.T.F.); Mk 40 all Mods (V.T.F.)

Auxiliary Detonating Fuze:
-Mk 17 and Mods
-Mk 46 Mod 0
-Mk 54 Mod 0

This projectile is fuzed with V.T. fuzes only.  The projectile adapter is removed, and a gas-checked base plug is inserted.  No tracer or base fuze is used with this projectile.

The Fuze Mk 40 and Mods is currently replacing the Mk 32 and Mods in all assemblies.  The Auxiliary Detonating Fuze Mk 54 is replacing the Fuzes Mk 17 and Mk 46 in all assemblies.

This round is also issued B.L. & P. or B.L. & T. with the Tracer Mk 6 and adapter, or a cut-off Base Fuze Mk 13 for target practice.





5-inch A.A. Common Mk 31 Mods 1 - 11

No picture available

Guns used in: 5"/38
Overall length w/ nose fuze: 20.7 inches
Overall length w/o nose fuze: 16.625 inches
Diameter of base: 4.97 inches
Distance base to band: 2.43 inches
Width of band: 2.25 inches
Diameter at bourrelet: 4.985 inches

Filling: Explosive D, Composition A
Weight of filling: 7.25 pounds
Weight of loaded projectile: 55.12 pounds
Charge/Weight ratio: 13.33%

Cartridge case: Mk 5
Primer: Mk 13 and all Mods
Tracer: None
Fuzes: Mk 32 all Mods (V.T.F.); Mk 40 all Mods (V.T.F.); Mk 53 and all Mods (V.T.F.)

Auxiliary Detonating Fuze:
-Mk 17 and all Mods
-Mk 44 Mod 0 and 1
-Mk 46 Mod 0
-Mk 54 Mod 0 and 1

The Mk 31 projectile was originally designed to receive the Base Fuze Mk 13, which is now obsolete.  The projectile will now be found fitted only with V.T. fuzes and a plug in the base.

The Nose Fuze Mk 40 is replacing the Mk 32 and Mods.  With these fuzes, the projectile adapter will be removed, and the Auxiliary Detonating Fuze Mk 54 will be employed, replacing the previously used Auxiliary Detonating Fuzes Mk 17 and Mk 46.

When the V.T. Fuze Mk 53 is used, the projectile adapter is removed and the Auxiliary Detonating Fuze Mk 44 employed.

This projectile is also issued B.L. & P. or B.L. & T. with the Tracer Mk 6 and adapter, or a cut-off Base Fuze Mk 13 for target practice.





5-inch A.A. Common Mk 34 Mod 10

No picture available

Guns used in: 5"/38
Overall length w/ nose fuze: 20.7 inches
Overall length w/o nose fuze: 17.2 inches
Diameter of base: 4.97 inches
Distance base to band: 2.43 inches
Width of band: 2.25 inches
Diameter at bourrelet: 4.985 inches

Filling: Explosive D, Composition A
Weight of filling: 7.25 pounds
Weight of loaded projectile: 55.18 pounds
Charge/Weight ratio: 13.33%

Cartridge case: Mk 5
Primer: Mk 13 and all Mods
Tracer: Mk 9

Fuzes:
-Base: Mk 28 and all Mods

-Nose: Mk 18 Mods 2, 3, and 4 (M.T.F.)
-Mk 50 Mods 0-4 (M.T.F.)
-Mk 29 Mods 2 and 3 (P.D.F.)
-Mk 32 and all Mods (V.T.F.)
-Mk 40 and all Mods (V.T.F.)
-Mk 64 Mod 0 (M.T.F.)


Auxiliary Detonating Fuze:
-Mk 17 and all Mods
-Mk 46 Mod 0
-Mk 54 Mod 0 and 1

This projectile consists of a Projectile Mk 31 Mo d10 modified to receive a Base Fuze Mk 28.  The Auxiliary Detonating Fuze Mk 54 is replacing the Auxiliary Detonating Fuze Mk 17 and Mk 46 in all assemblies.

The V.T. Fuze Mk 40 and its Mods are replacing the Mk 32 and Mods.  When these fuzes are used in this projectile, no base fuze or tracer is employed.  The projectile adapter is removed, and a gas-checked fuze-hole plug is fitted in the base.






5-inch A.A. Common Mk 35 Mods 1-12



Guns used in: 5"/38 (case), 5"/51 (bag)
Overall length w/ nose fuze: 20.7 inches
Overall length w/o nose fuze: 17.225 inches
Diameter of base: 4.973 inches
Distance base to band: 2.43 inches
Width of band: 2.25 inches
Diameter at bourrelet: 4.985 inches

Filling: Explosive D, Composition A
Weight of filling: 7.25 pounds
Weight of loaded projectile: 55.18 pounds
Charge/Weight ratio: 13.1%

Cartridge case: Mk 5
Primer: Mk 13 and all Mods
Tracer: Mk 9

Fuzes:
-Base: Mk 28 and all Mods

-Nose: Mk 18 Mods 2, 3, and 4 (M.T.F.)
-Mk 50 and all Mods (M.T.F.)
-Mk 61 Mod 0 (M.T.F.)
-Mk 29 Mods 2 and 3 (P.D.F.)
-Mk 32 and all Mods (V.T.F.)
-Mk 40 and all Mods (V.T.F.)
-Mk 53 and all Mods (V.T.F.)
-Mk 63 Mod 0 (M.T.F.)


Auxiliary Detonating Fuze:
-Mk 17 and all Mods
-Mk 44 Mods 0 and 1
-Mk 46 Mod 0
-Mk 54 Mod 0 and 1

The Nose Fuze Mk 40 is replacing the Mk 32 when used in the 5"/38 gun.  With the 5"/51 bag gun, however, Nose Fuze Mk 32 Mod 40, rather than the Nose Fuze Mk 40, is employed.  When these fuzes are used, the projectile adapter is removed, a gas-checked base fuze plug, with no tracer, is fitted into the base, and the Auxiliary Detonating Fuze Mk 54 is employed.

When the V.T. Fuze Mk 53 is used, the base is fitted with a gas-checked base-fuze plug, with no tracer, the projectile adapter is removed and the Auxiliary Detonating Fuze Mk 44 is employed.

The Auxiliary Detonating Fuze Mk 54 is replacing the Fuzes Mk 17 and Mk 46 in all assemblies.

With the 1200 f/s I.V. reduced charge for the 5"/38 gun, Nose Fuzes Mk 61 and Mk 29 Mods 2 and 3 with the Auxiliary Detonating Fuze Mk 54 will be employed.

All Mods of this projectile, except Mod 6, may be issued B.L. & P. or B.L. & T. with the Tracer Mk 9 and adapter for target practice.

When these projectiles are used in the 5"/51 bag gun, the Primer Mk 15 Mod 1 is used.







5-inch Common Mk 36 Mods 1-4

No picture available

Guns used in: 5"/25
Overall length w/ nose fuze: 20.7 inches
Overall length w/o nose fuze: 17.225 inches
Diameter of base: 4.973 inches
Distance base to band: 2.43 inches
Width of band: 2 inches
Diameter at bourrelet: 4.985 inches

Filling: Explosive D, Composition A
Weight of filling: 7.25 pounds
Weight of loaded projectile: 53.85 pounds
Charge/Weight ratio: 13.5%

Cartridge case: Mk 4, Mk 4 Mod 2
Primer: Mk 13 and all Mods
Tracer: Mk 9

Fuzes:
-Base: Mk 28 and all Mods

-Nose: Mk 18 Mods 2, 3, and 4 (M.T.F.)
-Mk 50 and all Mods (M.T.F.)
-Mk 29 Mods 1, 2 and 3 (P.D.F.)
-Mk 32 and all Mods (V.T.F.)
-Mk 40 and all Mods (V.T.F.)
-Mk 53 and all Mods (V.T.F.)
-Mk 63 Mod 0 (M.T.F.)

Auxiliary Detonating Fuze:
-Mk 17 and all Mods
-Mk 44 Mods 0 and 1
-Mk 46 Mod 0
-Mk 54 Mod 0


When the V.T. fuzes are used, the projectile adapter is removed, and a gas-checked base-fuze plug, with no tracer, is fitted into the base.  V.T. fuzes are authorized for use in Mods 2 - 4 only of this projectile.

The Auxiliary Detonating Fuze Mk 54 is replacing the Auxiliary Detonating Fuzes Mk 17 and the Mk 46.  The Auxiliary Detonating Fuze Mk 44 is used only in conjunction with the V.T. Fuze Mk 53.

All Mods of the Projectile Mk 36 are authorized for use with A.P. steel nose caps and for designation as "H.C." projectiles.

All Mods of the Projectile Mk 36 may also be issued B.L. & P. or B.L. & T. with the Tracer Mk 9 and adapter for target practice.







5-inch A.A. Common Mk 47 Mods 0 and 1

No picture available

Guns used in: 5"/38
Overall length w/ nose fuze: 20.7 inches
Overall length w/o nose fuze: 52.43 inches (???)
Diameter of base: 4.985 inches
Distance base to band: 1.93 inches
Width of band: 2.25 inches
Diameter at bourrelet: 4.985 inches

Filling: Explosive D
Weight of filling: 7.11 pounds
Weight of loaded projectile: 55.18 pounds
Charge/Weight ratio: 7.7%

Cartridge case: Mk 5
Primer: Mk 13 all Mods
Tracer: Mk 9

Fuzes: Same as Mk 35

The Mod 1 differs from the Mod 0 in that the band seat has different knurling.

Only a few thousand of these A.A. Common Projectiles Mk 47 were made.

The Mk 47 was made to furnish a heavier projectile for some newer light-weight fuzes, hence maintaining a standard ballistic weight.  However, it has been fuzed exactly like the Mk 35 up to the present time.









5-inch Illuminating Mk 25 Mods 1-6 and Mod 2 (Obsolete)

No picture available

Guns used in: 5"/51 (bag or case);  Mod 2: 5"/25 (case)
Overall length w/ nose fuze: 19.975 inches
Overall length w/o nose fuze: 15.865 inches
Diameter of base: 4.948 inches
Distance base to band: 2.43 inches
Width of band: 2 inches
Diameter at bourrelet: 4.985 inches

Filling: Black Powder expelling charge; magnesium flare
Weight of filling: 2.5 ounces - expelling charge
Weight of loaded projectile: 54.5 pounds
Charge/Weight ratio: N/A

Cartridge case: Mk 3;  Mod 2: Mk 4, Mk 4 Mod 3
Primer: Mk 13 and all Mods
Tracer: N/A

Fuzes:
Nose - Mk 18 Mod 2, 3, and 4
-Mk 50 and all Mods
-Mk 63 Mod 0



The Mod 2 projectile, used in the 5"/25 gun, is identical to the Mod 1, except for modification of the rotating band.

When these projectiles are used in the 5"/51 bag gun, the Primer Mk 15 Mod 1 is used, and the Nose Fuzes Mk 50 and Mk 63 may be employed.  Use of the Nose Fuzes Mk 50 and Mk 63 is not authorized with rounds used in the 5"/25 and 5"/51 case guns.

The Illuminating Contents Mk 3 are used with projectiles Mods 1 through 4; projectiles Mods 5 and 6 are assembled with Illuminating Contents Mk 4 Mod 5 when used in the 5"/51 bag gun, Illuminating Contents Mk 3 when used in the 5"/51 case gun.











5-inch Illuminating and 5-inch W.P. Mk 27 Mods 1-10

No picture available

Guns used in: 5"/25
Overall length w/ nose fuze: 20 inches
Overall length w/o nose fuze: 15.8 inches
Diameter of base: 4.968 inches
Distance base to band: 1.93 inches
Width of band: 2 inches
Diameter at bourrelet: 4.985 inches

Filling: Black Powder expelling charge; magnesium flare
Weight of filling: 2.5 ounces - expelling charge

Weight of loaded projectile:
-Mods 1-4: 53.65 pounds
-Mods 5-10: 54.5 pounds

Charge/Weight ratio: N/A

Cartridge case: Mk 4, Mk 4 Mod 2
Primer: Mk 13 and all Mods
Tracer: N/A

Fuzes:
Nose - Mk 18 Mod 2, 3, and 4
-Mk 50 and all Mods
-Mk 63 Mod 0


Mods 1, 2, 3, and 4 have a band diameter of 5.10 inches, and Mods 5, 6, 7, 8, 9, and 10 have a band diameter of 5.12 inches.

The Illuminating Contents Mk 4 Mod 5 are used in this projectile.

The 5-inch W.P. projectile utilizes the Mk 27 body with incendiary contents.











5-inch Illuminating Mk 30 Mods 1-8


Guns used in: 5"/38
Overall length w/ nose fuze: 20 inches
Overall length w/o nose fuze: 15.8 inches
Diameter of base: 4.968 inches
Distance base to band: 2.43 inches
Width of band: 2.25 inches
Diameter at bourrelet: 4.985 inches

Filling: Black Powder expelling charge; magnesium flare
Weight of filling: 2.5 ounces - expelling charge
Weight of loaded projectile: 54.5 pounds
Charge/Weight ratio: N/A

Cartridge case: Mk 5
Primer: Mk 13 and all Mods
Tracer: N/A

Fuzes:
Nose - Mk 18 Mod 2, 3, and 4
-Mk 50 and all Mods
-Mk 63 Mod 0


The Illuminating Contents Mk 4 Mod 5 are used in this projectile.








5-inch Illuminating Mk 43 Mod 0

No picture available

Guns used in: 5"/54
Overall length: 26 inches
Overall length w/o nose fuze: 22.28 inches
Diameter of base: 4.973 inches
Diameter at bourrelet: 4.985 inches

Filling: Black Powder expelling charge; magnesium flare
Weight of filling: 2.5 ounces - expelling charge
Weight of loaded projectile: 70 pounds
Charge/Weight ratio: N/A

Cartridge case: Mk 6
Primer: Mk 13 and all Mods
Tracer: N/A

Fuzes: Nose - Mk 25 Mod 1


The Illuminating Contents Mk 4 Mod 5 are used in this projectile, modified to use a lengthened spacer sleeve.

This projectile is identical to the 5-inch Illuminating Projectile Mk 48, except that the latter has a double rotating band.








Next Time: 5-inch Projectiles (Part 3)

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