https://strategypage.com/galle...-2018-11-08-2018.png

This picture shows a group shot of a US and Japanese naval exercise.

All the ships, except for the US Aircraft carrier USS Ronald Reagan, seem to have long trails of lighter blue water behind them. Those are called "wakes," right?

Why doesn't the Ronald Reagan seem to have a wake?

Thanks in advance for helpling me know more.

If the link doesn't work, here's the caption to the image

PHILIPPINE SEA (Nov. 8, 2018) The aircraft carrier USS Ronald Reagan (CVN 76), left, and the Japan Maritime Self-Defense Force helicopter destroyer JS Hyuga (DDH 181), right, sail in formation with 16 other ships from the U.S. Navy and the Japan Maritime Self-Defense Force as aircraft from the U.S. Air Force and Japan Air Self-Defense Force fly overhead in formation during Keen Sword 2018. Keen Sword 2018 is a joint, bilateral field-training exercise involving U.S. military and JMSDF personnel, designed to increase combat readiness and interoperability of the Japan-U.S. alliance. U.S. Navy photo by Mass Communication Specialist 2nd Class Kaila V. Peters

I think it is Photoshopped. God Bless

Don't know But the aircraft carrier is probably the fastest ship in the group.

All ahead slow?

See those doors in the aft? It could be a caterpillar drive.

Because the carrier is the lead ship. She's doing maybe 15 - 20 knots then slowing to 10 - 12 knots , all the others are turning hard(er) to catch up and pass. (The speed helps to prevent the ocean from pushing the lighter ships (and boats) into each other's paths.)

The photo opportunity is coordinated with about a 30 second window for the pic.

As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes.

You can't tell by the angle, it's hovering in VTOL mode.

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As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes

How is this possible? A boat that is three football fields long can outrun cruisers, destroyers, and small craft?

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Originally posted by Skins2881:

quote:

As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes

How is this possible? A boat that is three football fields long can outrun cruisers, destroyers, and small craft?

The longer the hull, the faster the ship - assuming sufficient power to push it. See “Froude number” for more info.

Aircraft carriers have lots of power. I believe the first nuclear carrier, the Enterprise, has more power than later ones, and may have been the fastest ever.

Carriers can outrun the rest of the battle group when needed.

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Originally posted by Skins2881:

quote:

As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes

How is this possible? A boat that is three football fields long can outrun cruisers, destroyers, and small craft?

Their nuclear power plants produce an astonishing amount of power.

Nuke carriers can HUAL ASS.

Re: the photo, it's just the other ships setting formation on the CVN. The CVN has some wake, but everyone else is setting off her.

That BUFF and what looks like a tanker along with the jets must damn sure be close to stall speed to stay within the group formation with the ships. Photoshop? Or would aerodynamics actually allow it? Even with that heavy ass B-52?

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Originally posted by comet24:

quote:

Originally posted by Skins2881:

quote:

As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes

How is this possible? A boat that is three football fields long can outrun cruisers, destroyers, and small craft?

Their nuclear power plants produce an astonishing amount of power.

I think the limiting factors are the hydrodynamic pressures on the hull and the ability of all parts to take the power output without failure.

After being stationed on board the Stennis and went through sea trials, I can tell you it can go 30+ knots.

I was stationed on the USS Truxton, DLGN-35 in the mid 70's. The 'N' stands for Nuclear. This was a 500' needle in the sea and, when a flank bell was issued, this ship was unbelievably fast.

But as fast as the Tommy T. was, the USS Enterprise (the only nuclear carrier at the time) could easily outrun us.

Not only are nuclear ships extremely fast, they don't need to stop for gas. I believe the new nuclear carriers have a 25 year core life.

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Originally posted by Cliff:
That BUFF and what looks like a tanker along with the jets must damn sure be close to stall speed to stay within the group formation with the ships. Photoshop? Or would aerodynamics actually allow it? Even with that heavy ass B-52?

Yeah, they didn't stay in formation.

They were called in once the ships had gotten into formation, then the planes were called in for flyovers (likely several times to get the shot).

Some of our vessels can get up and move. The Independence class LCS's unclassified speed is 44 knots (over 50mph) on their waterjet drive.

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As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes.

I won't post what speed I have personally seen a carrier run operations, but suffice it to say that they are faster than any othe ship in that photo, and could certainly outrun a torpedo if put in a race, but the torpedo is akin to a motorcycle, smaller and faster and more agile than the carrier who can just run straight fast.

And the carrier can absorb more than one torpedo hit...

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Originally posted by feersum dreadnaught:

quote:

Originally posted by Skins2881:

quote:

As a side note, pretty sure the carrier can outrun them all to possibly include the subs' torpedoes

How is this possible? A boat that is three football fields long can outrun cruisers, destroyers, and small craft?

The longer the hull, the faster the ship - assuming sufficient power to push it. See “Froude number” for more info.

To provide a little more information on this, this idea applies to vessels with "displacement hulls" - vessels where, regardless of speed, about the same amount of hull stays below the water.

This is in contrast to vessels with "planing hulls," where at speed, the vessel more-or-less sits on top of the water.

The way the hydrodynamics work out, a displacement hull vessel can reach a certain speed with relatively little power. To go beyond this speed requires exponentially more power. This speed depends primarily on the length of the vessel, and is referred to as "hull speed."

The rule of thumb is that for a waterline length given in feet, the hull speed in knots is about 1.34 * squareroot(waterline length).

For vessels the size of US aircraft carriers, this estimate gives a hull speed of a little more than 40 knots.

There are some things you can do to increase hull speed (the narrower a hull is, the higher its hull speed - an extremely long, narrow vessel like an ocean racing kayak can do something like twice the hull speed estimate), and enough power can push you somewhat past it.