EMALS & JPALS for the JSF

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Unread post25 May 2016, 04:02

On page 6 of this thread there is this info below: viewtopic.php?f=22&t=14115&p=263235&hilit=power+Pentland#p263235
Electromagnetic Catapults Are Emblematic Of U.S. Navy's All-Electric Era
07 Dec 2013 William Pentland

"...The whole EMALS juggernaut depends on the delivery of massive 122 megajoule-jolts of electricity to catapult planes into the sky. The jolts are so huge that the EMALS includes an elaborate energy storage system to supplement power provided by the nuclear reactors. The system stores a staggering 400 megajoules on four disk alternators.

After launching an aircraft, the alternators can be recharged in only 45 seconds. The supercarrier will be able to launch 220 sorties per day, about 25% more air missions per day than the current carriers...."

Source: http://www.forbes.com/sites/williampent ... ctric-era/
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Unread post13 Jun 2016, 05:41

See previous page for report that EMALS is better on Ford testing so far: viewtopic.php?f=22&t=14115&p=339226&hilit=EMALS#p339226
Arresting gear on Ford-class carriers under scrutiny
13 Jun 2016 By Hugh Lessig

"...Besides cost, [AAG] performance is also an issue. The committee notes "persistent delays in software development" that prompted the Navy to lower requirements for the AAG and eliminate a measure that it be back-fitted onto Nimitz-class ships.

In early 2015, the Navy considered using the current Nimitz-class system, called the Mark 7, on the upcoming Kennedy. It backed off.

The Navy "decided to continue with AAG, in part because the installation of the Mark 7 was estimated to cost $87 million more than AAG," the report states. "This appears to be a shortsighted decision given the extraordinary and continuing development delays and cost growth, including more than $500 million since this decision was made in February 2015."

The committee's report is the latest in a series of publicly stated concerns about AAG.

In November 2014, the Government Accountability Office report noted failures in land-based testing and the potential for delays if the system already installed on the Gerald R. Ford had to be modified.

In March 2015, then-Rear Adm. Thomas Moore said the system was about two years behind schedule due to problems discovered in testing that led to further work and redesign. At the time, Moore was the Navy's program executive officer for carriers. Now Vice Adm. Moore is the head of Naval Sea Systems Command, a post he formally assumed Friday.

In October, a Pentagon official told Congress that testing on AAG had not yet accumulated meaningful data, yet it was already installed on Ford.

Sen. Tim Kaine, D-Va., a member of the Armed Services panel, said a big challenge with the Ford-class program stems from introducing many new components all at once, instead of phasing in new systems over a series of ships. That decision was made some years ago.

As for AAG, he said there is no margin for error.

"I'm very aware of it," he said, "and I've had discussions with people at the shipyard about it."

He said the redesigned AAG "can't work 95 percent of the time. That's got to work 100 or 1,000 percent of the time. That is an area of real concern for the Navy. It's a concern for the shipyard and it's a concern for the committee."

Referring to committee's call for a full review, Kaine said, "We want the Secretary of Defense to basically give us a candid assessment of this, because we've got other ships under contract that are being designed. We want to make sure we are not putting our aviators at risk."

Source: http://www.dailypress.com/news/military ... story.html
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Unread post14 Jun 2016, 01:12

FWIW 138 megajoules is equal to .038 megawatt hours. Per Wiki:"In physics, power is the rate of doing work. It is the amount of energy consumed per unit time. Having no direction, it is a scalar quantity. In the SI system, the unit of power is the joule per second (J/s), known as the watt in honour of James Watt, the eighteenth-century developer of the steam engine. Another common and traditional measure is horsepower (comparing to the power of a horse). Being the rate of work, the equation for power can be written:

P = W t "

So the power required to launch an aircraft on a catapult takes roughly 1.33% of that generated by a 300MW reactor in one hour.
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Unread post14 Jun 2016, 01:20

Whatever the numbers - what is your point please? See details at top of this page.
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Unread post16 Oct 2016, 02:43

Navair Clips: AAG Traps First Fly-In
NAVAIRSYSCOM 14 Oct 2016

"Advanced Arresting Gear (AAG) completes its first fly-in recovery of an F/A-18E Super Hornet at the Runway Arrested Landing Site in Lakehurst, New Jersey, Oct. 13 [2016]. Conducted as part of AAG performance testing, this event follows more than 200 roll-in arrestments completed since late March. "This milestone test event demonstrates AAG's capability, and signifies a big step forward in getting the system ready for duty onboard the Navy's newest aircraft carrier, [Pre-commissioning Unit Gerald R. Ford (CVN 78)]," said Capt. Stephen Tedford, Aircraft Launch and Recovery Equipment program manager."

Source: http://www.navair.navy.mil/index.cfm?fu ... A8B5F03DBB

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Unread post16 Oct 2016, 03:45

I'm glad the AAG is starting to be on track.
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Unread post16 Oct 2016, 03:53

IIRC one of the issues with the AAG is not that it doesn't work. Rather that it is going to require a lot more maintenance than originally projected so anticipated savings won't meet expectations.
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Unread post16 Oct 2016, 03:54

So at worst, the life cycle cost will equal the old Hydraulic system?
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Unread post16 Oct 2016, 04:11

KamenRiderBlade wrote:So at worst, the life cycle cost will equal the old Hydraulic system?


....or now that it is computer controlled, the data steam from JPALS can be linked to automate and balance the energy consumption of the water turbines with the load of the a/c energy. Sadly, that wasted energy is yet to be captured by a generator and stored to a capacitor bank.
:(
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Unread post16 Oct 2016, 12:52

AAG traps first fly-in
14 Oct 2016 PEO(T) Public Affairs

"NAVAL AIR SYSTEMS COMMAND, PATUXENT RIVER, Md. -- Advanced Arresting Gear (AAG) completes a first-of-its-kind recovery of an F/A-18E Super Hornet at the Runway Arrested Landing Site in Lakehurst, N.J., Oct. 13. This event, conducted as part of AAG performance testing with the Super Hornet, follows more than 200 roll-in arrestments completed at the site since late March. The AAG test team conducted more than 1,300 dead-load arrestments on the Navy’s newest aircraft recovery system before involving manned aircraft.

“This milestone test event demonstrates AAG’s capability and signifies a big step forward in getting the system ready for duty on board the Navy’s newest aircraft carrier,” said Aircraft Launch and Recovery Equipment (PMA-251) program manager Capt. Stephen Tedford.

While roll-in and fly-in arrestments are essentially the same to the AAG system, conducting both types of traps enables the test team to ensure all operational conditions that the system will experience are tested. At the completion of AAG performance testing, an Aircraft Recovery Bulletin will be generated, allowing system testing with manned aircraft aboard Pre-Commissioning Unit Gerald R. Ford (CVN 78) to progress."

Photo:"Advanced Arresting Gear (AAG) completes a first-of-its-kind recovery of an Air Test and Evaluation Squadron (VX) 23-assigned F/A-18E Super Hornet at the Runway Arrested Landing Site in Lakehurst, N.J., Oct. 13. (U.S. Navy photo)" http://www.navair.navy.mil/img/uploads/ ... 0image.JPG (5.8Mb)
&
http://www.navair.navy.mil/img/uploads/ ... ame391.jpg (0.75Mb)


Source: http://www.navair.navy.mil/index.cfm?fu ... ry&id=6383
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Unread post20 Oct 2016, 12:45

Sad to see the SupaDupa Hornet being cut out of JPALS. Anyhoo it blasts ahead for F-35B/Cs and STINGRAY whatever....
JPALS to Guide F-35, MQ-25 to Shipboard Landings
19 Oct 2016 RICHARD R. BURGESS

"ARLINGTON, Va. — The Joint Precision Approach and Landing System (JPALS) being developed by Raytheon will be guiding the F-35 Lightning II strike fighter to shipboard landings as early as 2018 and, in the future, will be doing the same for the MQ-25 carrier-based refueling unmanned aerial vehicle.

The JPALS is scheduled to achieve early operational capability on two amphibious assault ships in 2018 and initial operational capability in mid-2020, Mark Maselli, JPALS deputy program manager, Raytheon Intelligence, Information and Services., told Seapower Oct. 18.

JPALS uses differential Global Positioning System (GPS) signals to guide an aircraft to the deck of a ship with a precision difficult to achieve under control of a human pilot in any kind of weather and in darkness. With triangular data links between the aircraft, ship and satellite continuously transmitting faster than a second, the ship’s positions are recalculated continuously as the aircraft approaches. The aircraft is not reliant on a ship’s radars and beacons.

The JPALS will be used by both the F-35B and F-35C variants of the Lightning II and be part of the Block 3 software version on the aircraft. There are no additional avionics components for the F-35, just a portion of the F-35’s mission software.

JPALS has been tested in a Navy F/A-18 Hornet strike fighter, including taking the aircraft to carrier landings, said Bob Delorge, vice president of Transportation and Support Services at Raytheon’s Intelligence, Information and Services business, told Seapower. The F/A-18 made 38 landings on a carrier with JPALS. Raytheon has tested JPALS for 40,000 hours over the development program so far.

The original concept was for JPALS to take the aircraft down to 200 feet in altitude before the pilot resumed control. Under the current program, Raytheon will develop the capability for the aircraft — piloted or unmanned — to be guided all the way to the deck.

“The goal here is that the pilots [are] going to have a huge increase in confidence knowing that they’re going to return from a mission regardless of conditions that they’re coming back into,” Delorge said.

Under the concept, a signal is broadcast to the aircraft from the ship when the aircraft is 200 nautical miles away. The aircraft logs into the JPALS system at the 60-nautical-mile mark and starts two-way communication with the ship, Maselli said. The ship is receiving GPS data and accounting for pitch and roll of the ship in the sea. The aircraft also is receiving GPS data and sending it to the ship, which calculates relative position. At the 10-nautical mile mark the data transmission speed becomes multiple updates per second, with more data as well.

The hardened JPALS has anti-jamming and anti-spoofing security features, Maselli said.

The original vision for JPALS including retrofitting the Navy’s carrier aircraft fleet, but the current program is limited to moving forward with the F-35 and the MQ-25 and any subsequent aircraft types, Maselli said.

The Navy in September awarded to Raytheon $255 million for the development and production readiness of JPALS. Exercise of all options would bring the contract value to $270 million."

Source: http://seapowermagazine.org/stories/20161019-jpals.html
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Unread post21 Oct 2016, 05:39

Always good to know that USAF has got yur back JPALS - PALS indeed.... :devil: USAF WILL need AUTOland to get onboard! :devil:
Raytheon Advances JPALS Landing System for F-35B/Cs
20 Oct 2016 Bill Carey

"...On September 21, the Naval Air Systems Command (Navair) awarded Raytheon a $254.5 million contract to continue work on eight JPALS engineering development models (EDMs) and deliver two additional EDMs to support early operational capability requirements for the Marine Corps F-35B and Navy F-35C. The contract also calls for Raytheon to develop initial operational requirements for MQ-25 autoland.

JPALS is a differential GPS-based precision landing system that guides aircraft to carriers and amphibious assault ships in all weather conditions and in surface conditions to sea state 5 using an encrypted, jam-proof datalink. The system makes use of software and receiver hardware on the aircraft and an array of GPS sensors, mast-mounted antennas and processing/datalink equipment racks on the ship. The Navy plans to declare early operational capability on two amphibious assault ships in 2018 to support Marine Corps F-35Bs, Raytheon executives said. Initial operational capability is planned in 2020.

Navair awarded Raytheon a contract in July 2008 to develop the original eight EDMs, for what was then called Increment 1 of the program; a second increment was to develop a land-based capability for the Air Force. In late 2013, the Navy conducted a series of test landings to the deck of the aircraft carrier USS Theodore Roosevelt using two F/A-18C Hornets fitted with “functionality representative” avionics kits. The Air Force eventually withdrew from the JPALS program, leading to a breach of Nunn-McCurdy Act cost threshholds in 2014 and delaying the effort, executives said.

The existing eight EDMs are distributed among different locations, with two at a Raytheon laboratory in Fullerton, Calif., one at the Patuxent River, Md., Naval Air Station and the remainder on amphibious assault ships and CVN-class aircraft carriers.

All three F-35 models will have JPALS capability embedded in Block 3F software, the final software release under the F-35 system development and demonstration program. But Air Force F-35As are not covered under Raytheon’s contract. “This ties in with the Navy’s investment on the F-35,” said Robert Delorge, Raytheon vice president for transportation and support services."

Source: http://www.ainonline.com/aviation-news/ ... m-f-35b/cs
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Unread post21 Oct 2016, 12:46

A few more details such as 20cm accuracy (almost 8 inches) & I like the VAGUE last paragraph....
Rockwell Collins awarded $67 million contract to complete subsystem development for Navy’s next generation precision landing system
20 Oct 2016 Rockwell Collins PR

"...“The JPALS system provides a new level of safety for carrier-based pilots that will help them accomplish their challenging missions,” said Troy Brunk, vice president and general manager for Communication, Navigation and Electronic Warfare Solutions at Rockwell Collins. “The accuracy provided by the system — supported by our datalink and GPS subsystems — was proven during carrier trials using combat aircraft.”

During flight trials, F/A-18C Hornets from the “Salty Dogs” of Strike Aircraft Test Squadron (VX- 23) successfully made more than 60 touch-and-go landings on the USS Theodore Roosevelt (CVN-71). In all, JPALS guided the Hornets to a “hands-off-the-stick” 3-wire landing to within approximately 20 centimeter accuracy.

“JPALS is clearly a safety and readiness- enhancing, game- changing capability which will extend the life of carrier- based aircraft, as well as allow the Navy to focus training on warfighting, rather than take-offs and landings,” added Brunk....

...Rockwell Collins has been a major supplier to this program since it began in 2008. This latest contract phase will help the JPALS program complete development and prepare for production of the Navy’s current and future fleet, including the F-35."

Source: http://www.rockwellcollins.com/Data/New ... JPALS.aspx
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Unread post02 Nov 2016, 23:31

Some positive vibes re AAG.

https://news.usni.org/2016/11/02/navsea ... ws-promise

NAVSEA: Ford Carrier Advanced Arresting Gear Testing Shows Promise

WASHINGTON, D.C. — The troubled General Atomics Advanced Arresting Gear program is doing well in its delayed testing program on land and on carrier Gerald R. Ford (CVN-78), the head of Naval Sea Systems Command told reporters on Wednesday.

Last month, Naval Air Systems Command successfully landed an F/A-18E Super Hornet at its land-based test facility in Joint Base McGuire-Dix-Lakehurst, in Lakehurst, N.J. 12 times in a day with no problems in a little-publicized test and shipboard testing of the AAG system on Ford is doing well, said Vice Adm. Tom Moore...

“When that ship delivers we’ll be ready to land aircraft on AAG. I think 78 is doing much better and I think we’ll have a fully functional system,” Moore said.
“I don’t want to presuppose any decision but I believe if the system functions the way it does on 78 — and given where we are on CVN 79 and the construction of the ship — that it’s a very strong and viable path forward for us.”
Last edited by popcorn on 03 Nov 2016, 09:53, edited 1 time in total.
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Unread post03 Nov 2016, 09:37

NAVSEA Commander: Ford Commissioning Decision by Year’s End; CVN 79 on Track
02 Nov 2016 RICHARD R. BURGESS

"...Moore said that testing of the Electromagnetic Aircraft Launch System is complete and that testing of the Advanced Arresting Gear (AAG) is about 56 percent complete. He said good progress is being made with the land-based AAG test site at Naval Air Warfare Center Lakehurst Division in New Jersey.

“We’re had the first 12 aircraft land into AAG,” he said. “We thought that would take a week. We did it in a day.”..."

Source: http://seapowermagazine.org/stories/20161102-cvn.html
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