Whelmy 1,970 Report post Posted August 9, 2015 (edited) 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) Spoiler 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 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) Spoiler Subject to editing as I find new info. Edited November 6, 2018 by Whelmy 1 11 Share this post Link to post Share on other sites More sharing options...
JEI2 5,766 Report post Posted August 9, 2015 interesting.. Share this post Link to post Share on other sites More sharing options...
