Intrepid
Major
Re: PLAN Carrier Operations..News, Videos & Photos II
Harriers on a "big deck carrier" in the 1970th:
Aircraft Carriers II (Closed to posting)
- Thread starter Jeff Head
- Start date
- Status
Several sources.
The Program Executive Officer of the US Navy for Aircraft Carriers produced this a few years ago:
In that last, the statement of interest is this:
"The Navy’s plan for future carrier air wings include one 12-plane squadron of F/A-18E fighters, one squadron of the two-seater F/A-18Fs, one 10-plane squadron of Joint Strike Fighters, a squadron of the Marine Corps’ JSF, five EA-18G Growlers, five E-2B Hawkeyes and five UCAS."
Finally, in a study commissioned by the US Navy and conducted y RAND we have this:
The Operative statement here comes on page 90 with this:
"As a result of these changes, the standard airwing composition in the 2020s will be even further simplified and
streamlined. A typical mix will then be 12 F/A-18Es, 12 F/A-18Fs,and 20 F-35C Joint Strike Fighters. Air wings will include 44 strikefighters (both Super Hornets and JSFs), four UCAVs for ISR, fiveEA-18Gs, five E-2D Advanced Hawkeyes, and 11 MH-60 helicopters."
The UCAV component is not expected by 2020...but will come about during the first half of the 2020s, thus that projected airwing is "for" the 2020s, but not "by" 2020.
Last edited:
Re: PLAN Carrier Operations..News, Videos & Photos II
No the launch would not be quicker. Alert 5 is an aircraft that is ready to launch in 5 minutes...
This is what the USN alert 5 consist of.
2 Fighters..Hornets/Super Hornets these days
1 E2-C
1- tanker(F-18 these days so equipped unless an USAF tanker is milling about smartly overhead).
1-2 SH-60s helos for SAR
All these are launched in 5 minutes...
This is the launch sequence
First a helo..(unless a helo is already airborne)
next the fighters
then the E-2C
and lastly a tanker.
And believe it or not there are other aircraft standing by in case one of the a fore mentioned aircraft has some sort of malfunction.
Oh yes..there also many times there are other alert aircraft standing by to smoke check any bad guys that need to be ..taken care of...usually called alert 15 or 30.
No the launch would not be quicker. Alert 5 is an aircraft that is ready to launch in 5 minutes...
This is what the USN alert 5 consist of.
2 Fighters..Hornets/Super Hornets these days
1 E2-C
1- tanker(F-18 these days so equipped unless an USAF tanker is milling about smartly overhead).
1-2 SH-60s helos for SAR
All these are launched in 5 minutes...
This is the launch sequence
First a helo..(unless a helo is already airborne)
next the fighters
then the E-2C
and lastly a tanker.
And believe it or not there are other aircraft standing by in case one of the a fore mentioned aircraft has some sort of malfunction.
Oh yes..there also many times there are other alert aircraft standing by to smoke check any bad guys that need to be ..taken care of...usually called alert 15 or 30.
Re: PLAN Carrier Operations..News, Videos & Photos II
Sorry I missed this post. But the exercise actually happened. I used that site because it's not a PDF file like the official site which I could not find....But I did today..
This was published by the Center for Naval Analysis. This is a long read. But It will tell you what an USN CVN can do in a surge situation. From weapons build up to launching aircraft. and maintaining those air strikes over a period of several days. There's a lot more to this sort of operation than launching a few aircraft very quickly of the bow.
[h=3][/h]
Sorry I missed this post. But the exercise actually happened. I used that site because it's not a PDF file like the official site which I could not find....But I did today..
This was published by the Center for Naval Analysis. This is a long read. But It will tell you what an USN CVN can do in a surge situation. From weapons build up to launching aircraft. and maintaining those air strikes over a period of several days. There's a lot more to this sort of operation than launching a few aircraft very quickly of the bow.
[h=3][/h]
Intrepid
Major
Re: PLAN Carrier Operations..News, Videos & Photos II
And on CV 67 the inner waist cat with 310 feet length compared to normaly 250 to 275 ft was able to throw the heaviest aircraft in the air without wind over deck. From CVN 68 on all 4 cats are able to do so.
Re: PLAN Carrier Operations..News, Videos & Photos II
Ahem.. On the America CV-66 while at anchor in St Thomas US Virgin Island in February 1981 VS-33 launched one S-3A from a waist cat (don't know which one) while at anchor. I know because I saw it with my own eyes. I was assigned to VS-33. And S-3A had a lot of wing span with a lot of lift.
Ahem.. On the America CV-66 while at anchor in St Thomas US Virgin Island in February 1981 VS-33 launched one S-3A from a waist cat (don't know which one) while at anchor. I know because I saw it with my own eyes. I was assigned to VS-33. And S-3A had a lot of wing span with a lot of lift.
With all due respect, I would disagree in principle. The stress on the undercarriage of an carrier launch aircraft is always immense regardless of if you use a CAT or a ski.
Lets run some simple numbers, lets say a 44 ton (lets say 4000 kg), F14 is propelled down the enterprise with a .. actually i can't find the launch force, but lets use your numbers; 300 feet = 100 meters, 130 knots = 67 m/s. Work = force X displacement, assuming work = K energy retained, so F X D = 1/2 X m X V^2
F = 0.5*4000*67^2/100 = 89.8 kN; around 20,000 lbf? does this sound right?
Assuming the nose gear is 1.5 meter high, that is 135 kNm or ~100,00 lbft of moment,
Assuming the nose gear is 4 inch diameter steel rod or 100 mm with a 10 mm wall, the shear stress is XX kPa; where the modulus of rigidity for steel is ~70 GPa
These are large numbers -> if I did not do something wrong, well I am a Mech, not a Material engineer; so I have no perception of how reasonable they are.
assuming a 12 deg ski vs a flat top,..... Actually, i don't want to go into a inertia calculation as all the simplifications will make it pretty moot.
What I am willing to say is that the rate of descend with the slamming of the front wheel onto the deck when the plane traps, will most likely result in a large compressive force on the front carriage assembly than a CAT can exert on a ski jump.
There are of course merit of using CAT and Ski together, you can use a smaller carrier to launch fully loaded planes that world normally require a fairly large flat top to launch. You also have the ability to launch CAP from battle damaged carrier that have so unluckily lost it's steam plant.
And frankly, the pulley system exist already, in the form of launched roller coasters. The Formula Rossa launches its cars at 150 mph in 4.9 seconds, while the Hypersonic XLC launches at 109 mph at 1.8 seconds. these roller coasters have a 90 deg vertical ramp. Of course a roller coaster is very different than an aircraft.
Note also, most of the lift an aircraft experiences is from the angle of attack, not from the lifting profile of the wing. Infact at low speeds angle of attack generate 80% of the lift while the profile itself only 20%? And the max profile lift is when the angle of attack is around 15 deg?
Exterior on the structure, not much work will occur while she is sitting there in that position. However, I have been told that significant work continues internal to the carrier.
We saw a similar circumstance for years with the Liaoning while she sat at her berth. Ultimately, the big cranes were used and the exterior work necessary was accomplished, particularly to the island when it was modified.
But the IAC is new construction so the bow, stern and elevators, along with the island all still need to be added externally and that will not happen until she is back next to the cranes.
In the mean time, I would imagine outfitting (piping, HVAC, internal compartments, etc.) are moving forward. as they can.
- Status