Why does it take 1000 yards to arm the torpedoes?

Torpedoes can be set to arm within inches of leaving the tube

The 1000 yards is a safe distance for the sender as most Torpedoes have a seeker in the head you want the Torpedoe to be at a safe distance from you before it arms

and your sub is beyond the seekers ability to track you

it also ensures that your sub will not be effected by the blast

The Air force don't have that problem we just drop them and fly away and track them on the Computer

Torpedoes Armed

Torpedoes are released in water, which is much denser than air. If the torpedo explodes in the vicinity of the submarine, shockwaves from the explosions can travel through the water to reach the submarine more easily than in air, as water particles are closely packed. Futhermore, a torpedo does not reach 0 - 100km/h in 10 seconds (like a Ferrari), it is propeller driven thus it needs to travel a distance to gain speed for maximum penetration power.

Torpedoes have guidance systems which sometimes go wrong. During WWI and WWII torpedoes have been known to circle back and strike he sub that launched it. In fact it happened more often than military engineers would like to admit.

Having them travel a certain distance before arming allows the crew time to react and take appropriate measures in the event of a rogue. And actually the torpedo armed itself after a predetermined amount of revolutions of it's propellers.

Technically, I think it would be Ruben Droughns. He started out as a fullback and the year he blew up and made a name for himself he was actually listed as a fullback and didnt become the primary ball carrier until later in the season. Fullbacks today are a dying position. The few that remain are either hybrid "big running backs" like Greg Jones or dinosaurs like Mack Strong and Lo Neal. Alstot was probably the only other to in recent years to top 1000 yds... Richardson I dont think ever did top 1000 in rushing. EDIT- Mike Anderson moved to fullback after starting his career as a tailback I think. EDIT2- Nick is right, I was looking at total yardage. Alstot didnt do it. That would make Droughns the last one.

Torpedoes carry massive warheads that can do some major damage. One hit a target nearly three miles away and the sub still shook violently. These things are powerful. It needs a min distance much like rocket grenades need distance, its to safely arm the weapon. you dont want it to accidentally detonate near the sub. torps also need to actually find the target. they have advanced tracking systems to find the target it is looking for. they need the distance to clear the boat and find its target

It's a movie. The actual distance may be something else, likely classified information to those who do know.

Torpedoes likely carry several hundred pounds of high explosives, the submarine's crew would prefer that explosion to be some distance from their own vessel as water tends to transmit the shock very nicely.

because torpedoes are explosives, and water amplifies the shock of an explosion. I'd say it is a safety measure so that when and if it hits and explodes, your sub will not suffer any casualties or damage due to an explosion so close to the boat.

I would imagine it's because the torpedoes need to pick up speed while in the water, so that they'll be able to explode on impact.

But i'm not a military man, y'see?

So it doesn't blow up ten feet from the sub and sink themselves.