Riddle me that !

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YLG80
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Re: Riddle me that !

Post by YLG80 » Thu Oct 08, 2020 11:00 pm

fightingiron wrote:
Thu Oct 08, 2020 3:35 pm
H.E.P. - High Explosive Plastic
There is plastic in the round head but the object on the photo has not been created by H.E.P.
Still two letters to find :wink: !
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794


Joe Gopan
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Re: Riddle me that !

Post by Joe Gopan » Fri Oct 09, 2020 5:11 am

HE "Sticky"?
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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YLG80
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Re: Riddle me that !

Post by YLG80 » Fri Oct 09, 2020 8:19 am

Joe Gopan wrote:
Thu Oct 08, 2020 12:53 pm
The British had a "HESH" Round (High-explosive squash head) in WWII.
And the winner is .... Joël.
thumb-up.jpg
thumb-up.jpg (1.67 KiB) Viewed 1059 times
The scab shown on the picture in the first post has been created by a 90mm H.E.S.H round (High Explosive Squash Head) fired from a distance of 1000m (3,280ft).
That was on our factory proving ground.
The round was fired by an M41 Walker Bulldog tank almost "point blank" on a steel plate target of about 4-5cm or 1,5-2 inches.
The scab thickness is about 15mm or 0.6in.
So a quarter of the steel thickness was extracted from the steel plate.
Imagine the horrible situation when it happens in the inside of a tank.

During the cold war, countermeasures were quickly found.
It consisted first in adding a layer of kevlar or other material inside the armor to avoid the scab to fly in the tank.
Later, the armor was converted into a multi layer armor to avoid the shock wave to propagate through the steel from the outside to the inside.
The H.ES.H. was almost abandoned in tank battles but is still used against buildings.

So that steel scab souvenir is almost a piece of history.
Thanks Joël !
Yves
90mm-HESH-T_MK8.jpg
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Last edited by YLG80 on Fri Oct 09, 2020 9:45 am, edited 1 time in total.
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794

Joe Gopan
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Re: Riddle me that !

Post by Joe Gopan » Fri Oct 09, 2020 9:23 am

:wink:
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

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dpcd67
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Re: Riddle me that !

Post by dpcd67 » Sat Oct 10, 2020 5:33 pm

Just saw this; HEP (Fired many round of it from the M68 Cannon), and HESH are the same things. Just big hunks of Comp B. We no longer use them (on the 120mm, M256 Cannon) as they were of limited usefulness; and when you can only carry 40 rounds, you can't waste space; you can do anything you want with HEAT on armor, bunkers, and buildings. Or even SABOT can be used for punching through bunkers; and concrete buildings. It is a waste to use tanks on buildings though. They are for Mechanized warfare, not Urban fighting; this is very dangerous.
Tank cannons.
U. S. Army 28 years.
Armor Branch

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YLG80
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Re: Riddle me that !

Post by YLG80 » Sat Oct 10, 2020 11:52 pm

Thanks, an advise from a specialist :wink: .
Mecar seems to continue to sell HESH rounds, but you are right, they are seldom used these day's and since the "nineties".
I remember we were also manufacturing 120mm AT "tungsten arrows" much more efficient.
These rounds were similar to your SABOT ( depleted Uranium i.o tugnsten) with a composite sabot.
Initial speed of about 1.700-1.800m/s (3.800mph)
The energy flash light was spectacular when penetrating a 200mm thick target steel plate.
I guess there were other evolutions since I've left that industry in 1991.
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794


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