Aircraft Carriers II (Closed to posting)

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asif iqbal

Lieutenant General
Príncipe de Asturias and Giuseppe Garibaldi barely operated even Harriers , usually no more then six of them . Harrier is much smaller and lighter then F-35 B (which by the way doesn't have folding wings ) . Invincible class has about the same displacement as 22DDH if you exclude provisions for troops and armored vehicles within 22DDH . And yet , Invincible class cannot operate F-35B (lifts , hangars etc ... ) according to British .

We are left with Cavour , somewhat larger then 22DDH (30 000 t full load ) but according to Italians admission it cannot operate F-35B right now and will have to be modified with increased displacement (if they find money to do that :D )

Invincible class can't operate F35B?? Whoever said the invincible class will even be in service when Royal Navy gets F35B, what are you talking about, F35B and invincible class have nothing to do with each other

And you are clearly not up to date with the F35B, Italy has a order set for this aircraft so that ends that story, full stop
 
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delft

Brigadier
Invincible class can't operate F35B?? Whoever said the invincible class will even be in service when Royal Navy gets F35B, what are you talking about, F35B and invincible class have nothing to do with each other

And you are clearly not up to date with the F35B, Italy has a order set for this aircraft so that ends that story, full stop

What is the likelihood that Italy will be able to pay for them?
 
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asif iqbal

Lieutenant General
What is the likelihood that Italy will be able to pay for them?

Italy order book was big, 131 units down to 90, they will buy but not as much as initially stated

For full Cavour operations they need 22 F35B, that is enough for the needs of the Navy
 
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thunderchief

Senior Member
Here is a picture of the Principe de Asturias with seven Harries aboard...that's a good load for a 17,000 tons carrier.

But, here's a picture of the even smaller Garibaldi, at 13,000 tons, with eight Harriers.

Nice pics , but Harriers usually perform rolling takeoff in real operations , like below . My guess is that those pictures were a bit of military show-off :D , cause I don't expect from Italians and Spaniards to fill the deck with aircraft in real combat situation .

[video=youtube;NAYjZPneasQ]http://www.youtube.com/watch?v=NAYjZPneasQ[/video]

They were capable of carrying even more if necessary, but because there have been no major conflicts for them to be involved in, of course they normally operated with far less than their overall capability.

They operated in configuration that was practical : 4-6 Harriers and about 10-12 helicopters .


The F-35B is 4 1/2 feet wider than the AV-8B and 4 ft longer. While that is a larger footprint, it is not a lot bigger, and the elevators of both the 22DDH and Cavour can handle them. The weight is 10,000 libs heavier empty...and that is quite a boit of course. But that was one of the points in building them. The US Navy and Marines wanted an aircraft that could carry significanlty more ordinance than a Harrier, and carry it further. in order to do that, the aircraft itself had to be heavier.

Again , problem of the lifts , hangar space and deck length . Yes , F-35B could take off vertically like Harrier , but to have meaningful range and payload it would have to perform rolling takeoff . Being heavier , it would require more deck .


No, it is not...the Invincible was alos set uip to be able to carry troops if necessary. The fact is, the full load displacement of the Invincible class is 20,300 tons, and the 22DDH is 27,000 tons. it is a good bit longer, wider, had a heavy deck edge elevator, and has a signficantly larger hanger. Neither of these vessels were set up to have carrying troops be a major part of their operational capability, though they can carry some.

Invincible class could carry troops instead of aircraft . 22DDH (also known as 19000t-class destroyer ) should carry both helicopters and troops by the design . Btw , Invincible class was around 22 000 t fully loaded .

If the Italians intend to continue with a fixed wing naval air capability, then they will most definitely operated F-35Bs off of the Cavour. The Italians are purchasing them, and the Harriers are at the end of their service life. It's just as simple as that.

Well they do intend , and will they have the cash remains to be seen . ;)

The 22DDH will be able to accomodate F-35Bs, even if they make some changes in order to do so. In the long view and overall sense of things, those changes will be relatively minor.

22DDH could operate F-35B if they enlarge the hangar on the expense of carrying troops , reduce number of helicopters , and strengthen the deck to withstand the heat . I don't know if the elevators could support F-35B . Even if they do all of that , they could operate only handful of F-35Bs . Is it worth of trouble - I don't know

Invincible class can't operate F35B?? Whoever said the invincible class will even be in service when Royal Navy gets F35B, what are you talking about, F35B and invincible class have nothing to do with each other

I said that such small carriers could not operate F-35Bs even for the tests . Check this :
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What is the likelihood that Italy will be able to pay for them?

Billion $ question :D
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-------------------------------------------------

I agree to leave it at this , too much off-topic , and only future knows what would happen to 22DDH project
 
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Jeff Head

General
Registered Member
Nice pics , but Harriers usually perform rolling takeoff in real operations , like below . My guess is that those pictures were a bit of military show-off.
Of course they were showing off. It is clear that they did not intend to take off like they are shown on the Garibaldi. Just because they were lined up for a picture does not mean they will take off that way. They would take the Harriers aboard (in this case 7 and 8) and then gather them at the aft section and line up for the take off, rolling forward off the deck.

[quote-thunderchief]They operated in configuration that was practical : 4-6 Harriers and about 10-12 Of course they did, as I said, there was no war going on so they just needed to maintain their capabilities and perform their exercises. That was implicit in my own answer. The point is, they could carry more anytime it would have been warranted.

thunderchief said:
Again , problem of the lifts , hangar space and deck length . Yes , F-35B could take off vertically like Harrier , but to have meaningful range and payload it would have to perform rolling takeoff .
Of course it will. On any platform without a ski-jump, the roll will be longer. But they will roll to take off. The point here is, again, since they are capable of VTOL, they can maximize whatever deck is available to their benefit for which ever carrier they are operating off of.

thuinderchief said:
Invincible class could carry troops instead of aircraft . 22DDH (also known as 19000t-class destroyer ) should carry both helicopters and troops by the design . Btw , Invincible class was around 22 000 t fully loaded .
The 22DDH is not designed to carry troops as a matter of course. That will not be one of its primary purposes. It will be able to do so as required, principally for humanitarian relief. It is not an Amphibious or air assault vessel.

As to the Invincible class, as carriers they were rated at 20,300 for most of their life. The Illustrious, the only one left, is no longer a fixed wing aircraft carrier. They all went through a reft in the 1990s to increase the size of their flight deck, and then the Illustrious went through another refit recently to change her to an air assault aviation vessel. As a result, her displacement has increased to the current 22,000 tons shown by the RN and other sites because she is the only one left. Here is a good site that speaks of them as they were designed to be fixed wing (HArrier) aircraft carriers:
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, which has not changed its data to be up to date with the current data. I was speaking of her as originally outfitted for the fixed wig role in which she operated for most of her life. Anyhow, those additional 1,700 tons either way do not really have impact on this discussion because the Invincible Class were not ever going to be upgraded for the F-35B in any case.

thunderchief said:
22DDH could operate F-35B if they enlarge the hangar on the expense of carrying troops , reduce number of helicopters , and strengthen the deck to withstand the heat . I don't know if the elevators could support F-35B . Even if they do all of that , they could operate only handful of F-35Bs . Is it worth of trouble - I don't know
Actually the 22DDH vessels were designed to be built with the proper heat treatment and elevator capabilities. They are supposed to be built having in mind the future with both the V-22 and the JSF. When the first one comes out, I believe we shall see that she has been. At some point, once she is commissioned, just like the Hyuga cross decked and tested the V-22, I believe we will see the 22DDH cross deck and test the V-22 and the JSF.

As to the other issues, her hanger is already large enough for the F-35B. It is certainly true that the JMSDF could increase the number of JSF she can carry by enlarging the hanger, and by removing some of the room set aside for the humanitarian function.

As I said in my last post, if China continues to develop a larger and larger fixed wing naval aviation capability, I believe we will see the JMSDF respond with F-35Bs on the 22DDH vessels.

Thunderchief said:
I agree to leave it at this , too much off-topic , and only future knows what would happen to 22DDH project
That's fine. They did move these posts to the Carrier thread here so it is not really off topic now. But we have pretty much exhausted all of the issues and points on both sides. All we can do really, is wait and see.
 
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FORBIN

Lieutenant General
Registered Member
STOBAR system for CV inherently limits payload ?

Particularly heavy weapons air-ground/surface, big bombs... about 1T or more.

That is the question.

The Russian Navy aircraft carrier Admiral Kuznetsov is only STOBAR carrier combat ready but we never see images with SU-33 armed ?
In more SU-33 is a specialised fighter, because Kuznetsov being used as a mobile air defense base.

The ski-jump take-off is less demanding on the pilot, since the acceleration is lower, but results in a clearance speed of only 120–140 km/h (75-85 mph) requiring an aircraft design which will not stall at those speeds

Data for CATOBAR ?

I think STOBAR limit payload, your comments gentlemen, please.
 

Blitzo

Lieutenant General
Staff member
Super Moderator
Registered Member
I think STOBAR limit payload, your comments gentlemen, please.

An often claimed axiom with little investigation into whether it's true.

Just saying -- it's not.

no_name translated a great write up regarding Su-33's payload and MTOW on kuznetsov, and basically it said Su-33 could take off from kuznetsov with an operationally competent payload and fuel load, as well as MTOW, depending on the engine Su-33/J-15 used, and more importantly, the headwind the carrier is experiencing.

I believe the greatest advantage a CATOBAR carrier offers is the ability to launch fixed wing AEW planes, which a STOBAR simply cannot no matter how much headwind you give it. CATOBAR also offers the capability to launch fighters reliably without headwind, whereas STOBAR launched fighters may experience engine failure at the crucial moment and fall out under the carrier's path.

Here are the photos:

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A rough translation of the important bits: MTOW from a normal land based take off is 33tons, and take off from 110m using ski jump with 25 knots of headwind can take off with 32 tons, the MTOW. Without headwind, the 110m launch positions are limited to 28 tons. 110m are the 1 and 2 point take off positions.
From the 195m position it can take off with 32 tons without headwind.


So really this flies in the face of CATOBAR > STOBAR, where it shoudl really be CATOBAR > STOBAR (under certain circumstances)
And it actually makes a lot of sense that planes are still able to fly from STOBAR carriers with a full load or near full load. The Russians designed kuznetsov and ulyvanosk both with ski jumps in mind. The latter would have had cats on the waist, so why not stick them on the bow as well if a ski jump limited payload so much? Also India paid a lot to convert gorshkov into a STOBAR carriers, and they are quite demanding customers. Would they really have bought a carrier which Mig-29Ks cannot fly off with a less than full payload?

The only argument for the inferiority of STOBAR being unable to launch heavily loaded fighters is the lack of photos... but that I think is more due to the fact that the russian navy currently operate the world's only STOBAR carrier and haven't had the funds since kuznetsov was launched to properly arm their fighters. Also, more importantly, the whole "STOBAR can't launch fighters at MTOW" phrase has been repeated so often now without investigation that people simply accept it.


The only way to settle this once and for all is for us to wait for liaoning to launch a fully loaded J-15 or vikram to launch a fully loaded Mig-29K, but I think logic and evidence here should prevail.
 

delft

Brigadier
From Bltizo:
I believe the greatest advantage a CATOBAR carrier offers is the ability to launch fixed wing AEW planes, which a STOBAR simply cannot no matter how much headwind you give it.
An aircraft must reach at least minimum control speed before leaving the ski ramp. Fixed wing AEW planes will have good acceleration using propellers and they have a somewhat lower minimum flying speed and minimum control speed so there is no reason they cannot be designed to use ski ramps. You might add a jet engine as was used by An-26. You might go for contra-rotating props and so add about 10 % to the thrust at low speed for a given engine power. Minimum control speed can also be lowered by having a connecting shaft between the engines as used by V-22.
My idea for such a plane has a biplane configuration with wing fences between the wingtips and with side looking radar in those fences and in the bottom part of the vertical tail plane and with fore and aft looking radar in the leading edges and below the trailing edges of the wings. That would do away with the radome above the fuselage. It would also result in a considerably smaller wing span than a monoplane thus easing manovering on the flight deck.
 

delft

Brigadier
Italy order book was big, 131 units down to 90, they will buy but not as much as initially stated

For full Cavour operations they need 22 F35B, that is enough for the needs of the Navy
The Netherlands planned to buy 85 and are now down officially to 56, but rumor says 35 if the price doesn't increase further.
A similar reduction would bring Italy to 55. But how well is the price differential between -A and -B known?
 

Franklin

Captain
The USN and the Royal Navy are both converting to F-35's for their carriers in the near future. How are they going to work the internal weapons bay of that plane on the decks ?
 
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