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HeavyRabbit
02-11-2010, 02:49 PM
I heard something about modern US Aircraft Carriers being able to do something like 50-80 knots at top speed, and that it is supposedly classified information.

I can't remember where I heard this, but I distinctly remember hearing something about that, from whatever the source may have been.

It just doesn't seem possbile to me, however.

As well, I also heard about how the US, Canada, and Britain in WWII conducted experimenting with Arctic Aircraft Carriers, which were made entirely out of some kind of super packed ice, or something like that. The ice had some kind of special name, which I can't seem to recall.

Apparently, those Ice Aircraft Carriers were never commissioned, for whatever reasons.

Anybody else hear about any of this?

http://forums.ubi.com/groupee_common/emoticons/icon_confused.gif

wsimmons1980
02-11-2010, 02:56 PM
I am not sure about the speed of our carriers, but I doubt they can go that fast. As far as I know even new age torpedos max out at like 80 knots.

Here is a link to the ice carrier. It was a project in Britain and there was a good show on it on the History Channel awhile back.

http://en.wikipedia.org/wiki/Pykrete

Kaleun1961
02-11-2010, 04:15 PM
I'd guess around 35 knots top speed for a modern nuclear carrier. Aside from that, the escort vessels accompanying a carrier must be able to make at least the same maximum speed as the carrier. Carriers never sail alone, so there's no point in having the carrier go faster than her escorts.

WhiteKnight77
02-11-2010, 05:13 PM
30+ knots, but real speeds are classified.

Source (http://www.navy.mil/navydata/fact_display.asp?cid=4200&tid=200&ct=4)

AndyJWest
02-11-2010, 06:44 PM
With a conventional displacement hull, there is an upper speed limit at which a ship can travel, regardless of power. I don't have the formula at hand, but I'll see if I can find it - it is related to the vessel length but exactly how I'm not sure. There are ways of exceeding this limit slightly, but to get far beyond it you need a planing hull, which aircraft carriers clearly haven't got.

Edit ----
Using the formula from Wikipedia http://en.wikipedia.org/wiki/Hull_speed the limit would be around 44 knots, though more precise methods can now be used to determine this. 50 kts sounds just about plausible, but I'd think 80 kts was highly unlikely.

WhiteKnight77
02-11-2010, 07:06 PM
Andy, this quote from the page you linked to states:


The concept of hull speed is not used in modern naval architecture, where considerations of speed-length ratio and Froude number are considered more helpful. It is still used by amateurs in relation to traditional displacement hulls.

HeavyRabbit
02-11-2010, 07:24 PM
All of your points are well taken, except that, any enemies of the USA should understand, that what I have posted here about the supposed reach of our military power, might actually be correct, at least somewhat, but that is up to those enemies to figure out, and that those enemies, or those who choose to create havoc in this world, should take into account, that they will be dealt with accordingly, should they choose to defy the true defenders of the free world.

Amen.

Otherwise, Mr. WhiteKnight77, your avatar is an A-10 Tank Killer, if I am not mistaken?

So, what is that doing in a SHIII Forum?

lol

Best,

Rabbit

http://forums.ubi.com/groupee_common/emoticons/icon_cool.gif

WhiteKnight77
02-11-2010, 07:32 PM
I took a screenie back when I was playing Jane's USAF. I have used it ever since I joined the Ubi forums.

Most of the games I play are from Ubi and include GR, early Rainbow Six games, Splinter Cell (at least the first 2), the SH series along with iL2 and some LoMac,

Is this better?

http://screenshot.xfire.com/screenshot/large/c5e429d5210275b0c9f831a6622b724cbb77b897.jpg

http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

AndyJWest
02-11-2010, 08:02 PM
Originally posted by WhiteKnight77:
Andy, this quote from the page you linked to states:

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">The concept of hull speed is not used in modern naval architecture, where considerations of speed-length ratio and Froude number are considered more helpful. It is still used by amateurs in relation to traditional displacement hulls. </div></BLOCKQUOTE>

Yeah, I saw that. It gives a ball-park figure though. As I said, it says 44 kt, modern design techniques can exceed this, but I'd be surprised if they could almost double it, which is why I said I thought 80 kts unlikely. There are other factors than hull shape that come into play anyway - notably propeller design if you are attempting to push a displacement hull to it's limits.

I'm sure there are others about who know more on the subject than me, it just seemed a starting point for the question.

In any case, as has been pointed out, there is little point in having a fast carrier if the escorts can't keep up.

PhantomKira
02-12-2010, 12:49 AM
Hey WhiteKnight77, do you remember Jane's Fighters Anthology and USNF '97? I loved Jane's USAF, but unfortunately it doesn't like something about my more modern computers and crashes when loading anything after the main screen. Fighter's Anthology still runs though! (With an annoying buzz by the computer screen, but it runs, nonetheless.)

Threadjack complete! http://forums.ubi.com/images/smilies/blush.gif

WhiteKnight77
02-12-2010, 09:01 AM
Originally posted by PhantomKira:
Hey WhiteKnight77, do you remember Jane's Fighters Anthology and USNF '97? I loved Jane's USAF, but unfortunately it doesn't like something about my more modern computers and crashes when loading anything after the main screen. Fighter's Anthology still runs though! (With an annoying buzz by the computer screen, but it runs, nonetheless.)

Threadjack complete! http://forums.ubi.com/images/smilies/blush.gif

I have Jane's Fighter Anthology too. It was the first flight sim I ever bought, but the second game only to Rainbow Six (and the only reason why I bought a PC to begin with). I never did get USNF thought. I wonder how well FA would run on my MachV and GTX 285?

gamer025
02-12-2010, 08:13 PM
I suspect between 30-35 knots. Probably 32 average. Most warships today are 35 knots and under.

K_Freddie
02-13-2010, 02:00 PM
We had a high sea running off Cape Point when a US Task Force came by. Some of our 'elite' strike craft (capable of some 40Kts) were sent to 'intercept'.

Anyway my cousin said that the a/c's were doing 30+ knots but our strike craft could not keep up as the seas made the strike craft look like submarines than surface ships, only capable of doing about 20 knots in such seas.

Our defence force stuffed up so badly coz they bought these craft from Israel where the seas are calmer, but in the Roaring40's they were useless. http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif

GREYWOLFJD
02-14-2010, 09:28 AM
HeavyRabbit Posted Thu February 11 2010 13:49
I heard something about modern US Aircraft Carriers being able to do something like 50-80 knots at top speed, and that it is supposedly classified information.

http://forums.ubi.com/images/smilies/16x16_smiley-surprised.gif http://forums.ubi.com/groupee_common/emoticons/icon_frown.gif 50 KTS IS around 60 mph 80KTS wow over 100 mph http://forums.ubi.com/images/smilies/disagree.gif http://forums.ubi.com/images/smilies/disagree.gif

Celeon999
02-14-2010, 12:21 PM
My educated guess would be between 33 to 36 knots. http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

Everything above 38 to 40 knots is sci-fi if you ask me. http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

Container ships with comparable displacement values as the Nimitz class reach around 25 knots with 100.000 hp.

Usually, you need four times the power to reach the double amount of speed which means that around 400.000 hp would be required to get such a container ship to 50 knots.

The two reactors of the Nimitz class provide "only" 260.000 hp. 130.000 hp on two shafts each.

Hence i doubt that it can reach more than 36 to 38 knots, and that only under perfect weather conditions with the wind in her back.

WhiteKnight77
02-14-2010, 05:24 PM
Carriers have 4 shafts.

Celeon999
02-15-2010, 01:15 AM
Originally posted by WhiteKnight77:
Carriers have 4 shafts.


I know, as i said two shafts each. Two for each reactor.

logman01
02-15-2010, 02:37 PM
Back when I was stationed on the USS Theodore Roosevelt (CVN-71) we used to joke with the new guys about how fast the ship could go. We said that you could hit nearly 50 knots when you tied down four F-14s on the fantail and lit off their afterburners. It was always a joke, but when they would start to park F-14s on the fantail, we used to tell the newbies that we were getting ready for a speed run.

After that we sent them on mail buoy watch!

WhiteKnight77
02-15-2010, 06:34 PM
Originally posted by logman01:
Back when I was stationed on the USS Theodore Roosevelt (CVN-71) we used to joke with the new guys about how fast the ship could go. We said that you could hit nearly 50 knots when you tied down four F-14s on the fantail and lit off their afterburners. It was always a joke, but when they would start to park F-14s on the fantail, we used to tell the newbies that we were getting ready for a speed run.

After that we sent them on mail buoy watch!

We sent them after 5 gallons of prop or rotor wash. 50 feet of flight line was always fun too. http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

HeavyRabbit
02-15-2010, 07:31 PM
Very funny.

http://forums.ubi.com/groupee_common/emoticons/icon_rolleyes.gif

Except that it is I, who has personally experienced the horrors of 9/11, firsthand, and who has lost so many of my brothers and sisters, in that terrible trajedy.

I am a salty dog, so to speak, and those of you, who will not understand that, will lick the salt of my wounds, should you so decide to choose that option, so help me.

Otherwise, I welcome you aboard...

lol

http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif

PhantomKira
02-15-2010, 10:28 PM
My college roomie is on the USS Enterprise (CVN-65) and managed, through a friend of his, to get me aboard CVN-71 for a look see. Out on the flight deck, soon as I turned back toward the island I saw the saying I'd been looking for since boarding. There, in large letters across the island was that classic phrase:

"America's Big Stick!"

For those who aren't into American history, this is referring to Theodore Roosevelt's foreign policy when he was president in the very early 1900's, "Speak softly and carry a big stick". Essentially, if you have the muscle to back up your words, you don't have to shout to be heard, because people listen to force, or even potential force.

NotAPlayer98
07-11-2016, 06:37 PM
I heard something about modern US Aircraft Carriers being able to do something like 50-80 knots at top speed, and that it is supposedly classified information.

I can't remember where I heard this, but I distinctly remember hearing something about that, from whatever the source may have been.

It just doesn't seem possbile to me, however.

http://forums.ubi.com/groupee_common/emoticons/icon_confused.gif

Good range estimate for both conventional and nuclear. Funny thing is that as I look for obvious (to me) verification online, they seem to most all underestimate by a HUGE amount, as though it was some big important secret. But in six years of active duty, four of which were attached to air wing, about 1 1/2 years or so out at sea, no one EVER told me to keep the ship's speed to myself. Heck, the speed in knots showed up on the closed-circuit TV channels that showed the flight deck 24/7. Anyone walking by one of hundreds of TVs on the ship could see it. Silly "secrets."