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U.S. 105mm gun family


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shapeshifter #1 Posted Aug 10 2015 - 01:31

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U.S. 105mm Family.

The 105mm gun T4 came into being when the 90mm M1A1 gun was mounted on the 4-wheeled carriage as for the 120mm AA gun. This made the equipment look all carriage and "very little gun" Thus it was decided to make a bigger piece for the carriage, hence the 105mm.

 

T4 AA           65 calibers

T4E1            65 calibers

T4E2            65 calibers
T4E3            65 calibers           Strengthened breech block, rolling sear type

 

T5                48 calibers           Cut down T4 gun for tank use
T5E1            65 calibers           Full sized T4 for improved performance in tank use
T5E2            65 calibers           Recoil cylinders repositioned
T5E2*           65 calibers           Bore evac. mod on barrel
T5E3            65 calibers          

http://imgur.com/a/hfRYE

T5E2 Bore mod drawings, and T5E3 drawings.

 

 

T8                65 calibers           T5E1 gun on towed carriage

 

Muzzle brakes, 2 double baffle types, 2 single baffle types


T10

T10E1         T8 gun tipping point found to be muzzle heavy, so a lightened and reduced size brake was designed.

T10E2?               

T10E3?

 

Development of T5 series of guns stops 1949, T5E3 last design made 1949. Ammo development program for T5 series guns combined with T140 series.

 

Original T140 gun tubes autofrettaged, 110,000 PSI yield steel. One model autofrettaged with highest possible strength steel, considerably higher then 110,000 PSI

 

T140            65 calibers
T140E1        65 calibers
T140E2        65 calibers           Chromium plated
T140E3        65 calibers
T140E4        65 calibers           Lightweight version of T140E3

Following tubes will be of maximum lightweight jacketed construction (3 members) using high strength alloy steel of 160,000 PSI minium Y.S. for use with existing T140E2 and T140E3 breeches, recoil mechanisims and mounts. February 28 1957 REV. A

 

T140E5        65 calibers       Chromium plated, Standard rifling form, 1 in 25 twist, Mid tube evac.
T140E6        65 calibers       Unplated, Standard rifling form, 1" free gun 5" straight run variable twist, Mid tube evac.
T140E7        65 calibers       Uplated, Wide groove-- Narrow land, 1" free gun 5" straight run variable twist, Muzzle evac.
T140E8        65 calibers       Chromium plated, Standard rifling form, 1" free gun 5" straight run variable twist, Muzzle evac.
T140E9        65 calibers       Chromium plated, Wide groove-- narrow land, 1" free gun 5" straight run variable twist, Muzzle evac.
T140E10      65 calibers       Muzzle evac. Held at watervliet for inclusion of best design features decided by tests done on above gun tubes.

 

 

 

T4  gun ammo

 

H.E.

 

                  Weight            Velocity

 

T11            35 lb               3120 ft/sec
T12            38 lb               3000 ft/sec

3.28 lb explosive filler

 

APCBC HE

 

                  Weight            Velocity

 

T13            41 lb               2950 ft/sec
T13E1
T13E2        WD-9465 steel, thinner cap, superior performance against face hardened plate compared to E1
T13E3        WD-4370 steel, red. exp. charge. single radius on projectile body
T13E4

 

HVAP
        
T29 series

 

T5/T8 gun ammo (all T4 ammo able to fire in T5/T8 guns)

H.E.

 

                  Weight            Velocity

 

T30                                   3100 ft/sec
T30E1        34-35 lb          3150 ft/sec* M1 powder, T8 propellant
T30E1        red. vel.          2500 ft/sec* T20 propellant (reduced)
T30E2
T30E3        34.62 lb        Comb-B    

 

W.P. Smoke

 

                 Weight              Velocity

 

T46                                    2500 ft/sec *T20 propellant (reduced)

Ballistically identical to H.E. T30 

 

APBC

 

                Weight            Velocity

 

T37        39 lb            3000 ft/sec

 

APCBC

 

               Weight            Velocity

 

T32        39 lb            3000 ft/sec*  M1 powder, T8 propellant
T32E1    39 lb            3000 ft/sec*  M1 powder, T8 propellant

4.25 lb AP cap, steel ballistic cap.


T32E2

 

HVAP

 

               Weight            Velocity

 

T29        26 lb    8lb core            3850 ft/sec* M2 powder
T29E1    27.6 lb 10 lb core
T29E2                12 lb core
T29E3    24.6    10-12 lb core    3720 ft/sec* estimated, M1 powder T9 propellant
T29E4    24.6 lb 10 lb core         4200 ft/sec* estimated T12 propellant

 

HEAT-FS

 

        Weight                         Velocity

 

T?            Based on T131     ?

 

 

HEP

 

       Weight                        Velocity

 

T?          Based on T81        ?

 

 

Training/Test rounds

 

T39     Proof projectile simulating T32
T40     Proof projectile simulating T29
T52     Test round (intended for T5 guns, but never used. immediately adapted for use in a fixed round in gun T140)

T52E1 Test round (intended for T5 guns, but never used. immediately adapted for use in a fixed round in gun T140)

 

 

T140 gun ammo (T5/T8 guns could fire some if not all types)

 

HE, WP, AP, and TP rounds based on projectiles designed for T5 and T8 105mm tank guns.

 

 

H.E.

 

                  Weight            Velocity

 

T246          26.8 lbs           2400 ft/sec

 

Comb-B filling Fuze PD, T177E3, New thin wall design to increase the amount of lethal fragmentation

 

 

 

W.P. Smoke

 

                 Weight            Velocity

 

T247        

 

 

APBC

 

                 Weight            Velocity

 

T182        35 lb            3500 ft/sec
T182E1
T182E2
T182E3

T182E4

T182E5

 

HVAP

 

                 Weight            Velocity

T29 series                       4200 ft/sec* estimated T12 propellant

 

Canceled development September 1952 when T182 round was found to offer the same performance at extended ranges against sloped targets.

 

 

HVAPDS

 

                 Weight                            Velocity

 

T279        13.6 lbs      7.5 lb core    5100 ft/sec

 

 

HEAT-FS

 

                Weight                                   Velocity

 

T298        22.5 lb    Based T131E31     3700 ft/sec * M6 propellant, 3.02 lb Comp-B charge

 

        40,000 PSI at 3700 ft/sec, two rounds fired at 44,000 and 48,000 PSI which indicated spike design was inadequate for T298 design.

 

T298E1        Improved spike design    ?

 

 

HEP

 

                Weight                     Velocity

 

T297       Based on T81E41    2700 ft/sec ?

 

 

Canister

 

?

 

 

Training rounds

 

             Weight            Velocity

 

T79        ?                    ?    M17 propellant 17.38 lbs to give a MV of 3500 in T5E1 gun.
T79E1
T79E2
T52                                   Test round (intended for T5 guns, but never used. immediately adapted for use in a fixed round in gun T140)
T52E1                               Test round (intended for T5 guns, but never used. immediately adapted for use in a fixed round in gun T140)

 

 

 

Subject to editing as I find new info.


Edited by shapeshifter, Nov 03 2015 - 18:29.


phoenix58 #2 Posted Aug 10 2015 - 01:36

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bob34236 #3 Posted Aug 10 2015 - 02:17

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I dont know what this is but +1 because you took the time to write it.

benymazz #4 Posted Aug 10 2015 - 02:32

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View Postbob34236, on Aug 09 2015 - 20:17, said:

I dont know what this is but +1 because you took the time to write it.

 

It's a copy/paste from the Warth***er forums. Still interesting and somewhat useful though

shapeshifter #5 Posted Aug 10 2015 - 02:50

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Which I posted on the WT forums.

shapeshifter #6 Posted Aug 15 2015 - 04:15

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Added link to T5E2 Bore mod drawings, and T5E3 drawings.

CaptianNemo_VA_ #7 Posted Nov 03 2015 - 18:56

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As a general reminder to people who pass by, finding info for this sort of stuff is always one line at a time... per 40-100 page document... If your lucky.

Edited by CaptianNemo_VA_, Nov 03 2015 - 18:56.





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