Tank Gunnery 1976, Part 7, Final Engagement HEP-T at 2000 Meters

 HEP High Explosive Plastic, muzzle velocity 2,450 fps.  

In this night-fire picture, the flat trajectory of APDS is very clear.  

HEP-T at 2,000 Meters looks very different.

Now we reached the end of Table VIII Tank Gunnery 1976.   The last engagement was a house—an 8-by-8-foot panel between 1,500 and 2,000 meters from the firing position.  The ammunition is HEP-T—High Explosive Plastic-Tracer, the slowest round that tanks fire.  The actual rounds we fired is not the service ammo pictured above but the powder-blue inert rounds. 

This final engagement was truly different from the preceding three main gun rounds because it was the longest shot with the slowest round.  When we fired APDS “SABOT” rounds at the moving tank target at 1,000 meters distance, the round is traveling just over a mile per second leaving the gun muzzle.  Even allowing for wind resistance, the time to a target roughly 3,300 feet away is less than a second.  The trajectory is essentially flat.  For a tank-sized target, it is point and shoot.

When we fired HEAT at 1,500-meter target, the muzzle-to-target time was more than a second and I could see a ballistic arc, but with a 3,850-foot-per-second speed out of the gun tube, the trajectory was still close to flat.

For the final engagement my gunner was firing at a panel nearly seven thousand feet away.  The HEP-T round has a muzzle velocity of 2,450 feet per second.  So the time to target is nearly 3 seconds (2.7 seconds with wind resistance).  When you fire SABOT at 1,000 meters, it is difficult to see the tracer at all.  Firing HEP-T at this distance, the tracer goes up, up, up in a straight line then drops rapidly at the end of its parabolic trajectory.  

As anyone knows who has watched a 70-yard touchdown pass, the ball appears to go up for 60 yards then drop rapidly in the final ten yards, right into the receiver’s hands.  Actually, the peak of the arc, whether pigskin or HEP-T round is half of the travel time form the gun muzzle to impact. 

So for this final engagement, every skill of tank gunnery was important.  When I issued the fire command, the driver had to stop on what he saw as the most solid, level ground possible.  Any tilt of the tank would send the round off target to the left or right.

For every engagement we had just fifteen seconds from the moment we identify the target until the first round goes down range.  No problem with a flat shot at 1,000 meters. 

On the other engagements, I did not have to be perfect with the range finder.  On this target, I had to have the range right or we would not hit.  While Merc, my gunner, refined his aim, I made sure I had the best possible range, that my head was straight on the head rest and the sight picture was as good as I could get. 

With every other shot, Merc had a round down range fast.  With this one he made sure his sight picture was as perfect before squeezing his electric trigger.

Then he said, “On the Way!” 

I watched the round go down range for what seemed like minutes.  The red tracer went up in a straight line then seemed to drop almost straight down toward the target. 

Before the round hit the target, the loader yelled, “Up!” then clambered up through the hatch.  He wanted to see the round hit. 

Merc had the best view in the gunner’s seat with the sight on the target. 

“Hit!” I yelled on the intercom.  “Damn,” Merc said looking through the sight. 

What I saw through the binoculars and Merc saw through the primary sight was a dust cloud rising around the target, but the most important part of what we saw was that we could see the panel for just a moment after we saw the cloud.  That meant the round strike was behind the panel.  Of course, that could mean we missed by firing over the target, but we were pretty sure the dust pattern said Hit! 

I yelled, “Fire!” 

Merc refined his sight picture then announced “On the Way!”

It looked like another hit. 

I said, “Driver Move Out.” We rolled off the range. 

As soon as the grader left the tank at the ammo point, we started yelling and clapping and congratulating each other.  We unloaded brass and rolled to the rally point.

After night gunnery, which I really don’t remember well, we scored “Distinguished.”

We hit every target during daylight gunnery and range control confirmed we put a hole in the panel on the last engagement. 

Before gunnery that year, I read the entire Dash 10 manual.  I know the TM Number as well as I know my Social Security Number.  9-2350-215-10. 

I am in Army Aviation now and have had some great flights on Blackhawk, Chinook and Lakota helicopters.  But I am not part of the crew.  For the years I was in tanks, I was crew.  It really was the best job I ever had.

Tank Gunnery 1976, Part 6, Moving Truck, Coax Machine Gun

The second to last target on Table VIII is a moving truck panel.  As with the moving tank target, we had practiced tracking moving targets more than anyone else in the battalion.  We were ready to perforate the track mounted panel as soon as we saw it.  But the real preparation for this engagement was done by my loader, Gene Pierce.  The M73 coax machine gun was a reliable weapon in general, but in my experience was finicky about dirt and ammo feed.

The night before Table VIII Pierce cleaned our coax to whatever coax perfection can be.  By the time we reached the moving truck target, we had fired the coax twice in engagements one and four, firing 100 rounds at each firing point.  We had 100 rounds to hit the moving truck, which is plenty, unless the gunner gets interrupted and has to re-acquire his sight picture.

We were tense rolling from the .50 cal. engagement looking for the moving panel.  We also knew pretty much where the panel would be since the moving panels are in roughly the same area of the range.  Pierce was scanning with me, mostly to show the grader we were following procedure, but he was ready to drop down the moment we saw the target and ready to keep the coax firing if anything went wrong.

I saw the target move.  Announced "Gunner! Coax! Moving Truck!"  We stopped smoothly as I swung the turret to the moving panel.  Pierce yelled "Up!"  Merc said "On the way!"  Pierce lightly held the belt of 7.62mm ammo as it fed into the M73 machine gun.  Tracers sailed winked out of sight as the passed through the panel.  Merc knew he was on target and burned the 100 rounds in short bursts.  I announced "Cease fire! Driver move out."

Now we were heading to the last engagement.  The last round on Table VIII is still one of my favorite all-time moments in the Army.

In the meantime, an instructional video on the M73 coax machine gun.

"A Hero of Our Time" and "Brother" Wild, Wild West in Russia

I just finished the book "A Hero of Our Time" by Mikhail Lermontov.  If you like Western novels, or War novels, this book will make you smile.  I laughed out loud at some of the conversations among soldiers in this book.  So why does a novel with Russian soldiers as main characters make me think of "Western" novels and movies?  For the same reason the first Star Wars movie (1977) made me think Western: the setting an scenery is the frontier and civilization is somewhere else.  

"Hero" is set in the Caucuses mountains, near Georgia on the southern frontier of Imperial Russia about 200 years ago.  The soldiers in frontier outposts are there to protect the borders and and to stop the locals from rising in rebellion against their new masters.  The Russian soldiers trade with the locals and try to stay on peaceful terms, but they do not think the natives are fully human.  Just as the American soldiers in frontier outposts tried to keep the peace, but were ready to fight.

The novel is really several related stories revolving around the main character Pechorin and an old soldier named Maxim.  

The first time I read this book was in the summer of 1980 in a Russian Literature class at Penn State Harrisburg.  The professor loved this book.  He was a Serbian, a World War 2 veteran who fought the Germans and their allies the Croatians.  Professor Djordjevic was a 60-year-old chain smoker with not much longer to live when I met him.  He escaped to America through Hungary in 1956.  He fought the Nazis from the Serbian mountains and escaped the Russians who occupied Serbia through those same mountains.  Professor Djordjevic was a mountain soldier and clearly identified with "Hero."

"Brother" is related to "Hero" because for me it had that same feel of the lone hero/cowboy on the frontier.  In the case of Brother, all the action is in St. Petersburg, Russia, so the setting is not the frontier.  But it is in the 1990s in the midst of the economic collapse and lawlessness after the fall of the Soviet Union.  And the main character of Brother is a veteran of the nasty Chechen war of 1994.  The action at the end of the movie has many links to gunfights in traditional Western movies and watching Brother load his own shotgun shells will delight Western fans.

Russia, like America, started as a small country that grew by conquering and settling neighboring areas.  It had a "Louisiana Purchase"-like expansion in the 1600s when it bought Siberia for a price as cheap as the one America got.  Many of the problems Russia has had relate to rapid expansion and trying to hold on to conquered territory, just like the Wild, Wild West here in America.

Tanker's Final Exam, Part 5, .50 Cal. Machine Gun, 1200 meters

The commander's cupola with the M85 .50 Caliber Machine Gun is on top of the turret.  

As we rolled away from engagement 6, firing the main gun at a moving tank, next up was firing the .50 caliber machine gun a "truck" target.  Actually a plywood panel.  The target was almost 1,200 meters away.  My loader, Gene Pierce, spotted the target first on a rise to the left of the tank trail.  As we rolled from the last firing point, I made sure the commander's machine gun was in line with the main gun.

When we spotted the target, having the guns lined up meant I could swing the turret with the commander's override and be close to the target.  When the main gun was on target, my .50 cal. machine gun would be close to the target, so I could drop down into the turret and fire as soon as possible.

When I looked through the 1 to 1 sight, I saw the target, so I grabbed the cupola controls and got the gun on target.  I had spent a lot of time zeroing the machine gun on the static range.  And even when I could have shot "cowboy" not using the sights I made myself drop down in the turret and practice with the sights.  A 1,200-meter shot needs the sights.  The other reason I needed the sights was the limited ammo capacity of the cupola.  I had 100 rounds for two engagements.  That's enough if I am on target, but not enough to shoot with my head out.

I squeezed the trigger.  Pierce called hit on the second burst.  I put two more bursts in the panel and said, "Driver move out!"