EMALS & JPALS for the JSF

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spazsinbad

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Unread post10 Aug 2017, 21:35

Post here for factoid about 22 USN JPALS installations in last paragraph - rest of article about CVFs will go in that thread.
Here is the HUFF from NOT THE HUFFington POST: viewtopic.php?f=58&t=15969&p=373438&hilit=huffs#p373438
'No decision' on Raytheon GPS landing system aboard Brit aircraft carriers
22 Jun 2017 Gareth Corfield

"...A rather old webpage [see quote below] from the Federation of American Scientists explains in not-so-complex language how the AN/SPN-41 set works. It’s basically a navalised Instrument Landing System that broadcasts a glideslope along with azimuth information for arriving aircraft. The cockpit display consists of two needles, and once the pilot centres them both, he’s on the right path.

AN/SPN-41 "The Transmitting Set AN/SPN-41A is an electronic landing aid that provides proper flight path data to an approaching aircraft as the aircraft flies into range of ownship radar landing system or into visual contact with ownship optical landing system. The AN/SPN-41A has two separate transmitters (azimuth and elevation) with individual antennas used for sector scanning. The azimuth transmitter is installed on the ship's stern at the centerline of, and slightly below the landing deck runway; while the elevation transmitter is located above the flight deck in the vicinity of the after end of the island to provide the glide slope signal. The AN/SPN-41A uses one-way transmission, ship to air, to a receiver in the aircraft where the angular information is displayed on a cross-pointer indicator. With the vertical needle for azimuth guidance and the horizontal needle for vertical guidance, the aircraft becomes perfectly aligned with the runway centerline, on a standard glide path to the ship's deck, when both needles are precisely centered. Though not technically a radar system, the AN/SPN-41A operates utilizing pulse mode in the Ku-band. AN/SPN-41 and AN-SPN-41A systems are installed aboard CV, CVN, LHA, and LHD class ships. The AN/ARA-63 aircraft approach control system uses the AN/SPN-41 and the AN/TRN-28 transmitting sets. It provides primary or backup instrument approach capability." https://fas.org/man/dod-101/sys/ship/we ... spn-41.htm


JPALS, by contrast, is a GPS-based system. Rather than the ship broadcasting a glideslope to world+dog, JPALS emits an encrypted burst of data that allows the approaching aircraft to precisely fix the ship's position and make a safe landing. The USN is buying 22 JPALS sets for use with its F-35Cs and the USMC’s F-35Bs."

Also from next post down at other URL: "...The USN is buying 22 sets of JPALS to install in both carriers and land bases for training purposes...." [QUE? CVNs & LHAs add up to 22?]


Source: https://www.theregister.co.uk/2017/06/2 ... 2386485241
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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Unread post24 Aug 2017, 16:09

:shock: Video of bits & pieces re FORD & EMALS / AAG - see how the deck is made rusty but it looks very clean otherwise! :doh:



PHOTO: https://i0.wp.com/fightersweep.com/wp-c ... cvn-78.jpg
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Spectacular-Video-of-the-Supercarrier-USS-Gerald-R_-Ford-cvn-78.jpg
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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Unread post25 Aug 2017, 05:41

"Norfolk, Va. (Aug. 21, 2017) Showing visible wear and tear from many days at sea, the aircraft carrier George H.W. Bush makes the turn into Pier 14 at Naval Station, Norfolk, Va. after returning from 212-day deployment. The cruise saw the ship and Carrier Air Wing 8 spend 99-day “on the line” in the fight against ISIS. Photo by Mark D. Faram/staff" https://www.armytimes.com/resizer/id3_T ... uality(100)/arc-anglerfish-arc2-prod-mco.s3.amazonaws.com/public/CV2TP3DOSJHPTMAOJZ7GUOGSUU.jpg & http://hrana.org/news/2017/08/carrier-b ... o-norfolk/
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BUSHcvnReturnAug2017.jpg
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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krorvik

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Unread post25 Aug 2017, 11:23

There must be salt in seawater or something.... ;)
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Unread post25 Aug 2017, 11:41

Worse ; there's dihydrogen monoxide. :mrgreen:
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krorvik

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Unread post25 Aug 2017, 12:58

Sounds dangerous. Should be banned.
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rheonomic

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Unread post25 Aug 2017, 16:15

All the hydric acid can't help either.
u = (CB)⁻¹(cvdt_des - CAx)
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SpudmanWP

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Unread post25 Aug 2017, 17:49

I have seen evidence of where it was used in a foolish attempt to stop an out of control exothermic reaction but was spilled on an innocent bystander instead.

She dissolved in seconds. :doh:
"The early bird gets the worm but the second mouse gets the cheese."
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spazsinbad

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Unread post28 Aug 2017, 06:35

LIAONING deck is so clean & rust free & freshly painted (never used) that the crew wear white gloves & eat chow off it.

https://cdn2.i-scmp.com/sites/default/f ... 103134.jpg
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RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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Unread post19 Sep 2017, 15:36

Raytheon Pitches Jpals Precision Landing For F-35A [BEST READ IT ALL AT SOURCE]
18 Sep 2017 James Drew

"NATIONAL HARBOR, Maryland—Raytheon has proposed an expeditionary version of the U.S. Navy’s GPS-based Joint Precision Approach and Landing System (Jpals), which was developed to securely guide Lockheed Martin F-35s onto carrier decks and Marine Corps amphibious assault ships. Brooks Cleveland, the company’s business development consultant for Jpals, says the landing system could support distributed basing of U.S. Air Force fighters and rotorcraft, beginning with the conventional takeoff and landing F-35A.... {USMC will be interested in this exped version also - they were once]

...Raytheon is also pressing the Navy to integrate its primary strike fighter, the Boeing F/A-18E/F Super Hornet, along with the three variants of the Bell-Boeing V-22 Osprey.

Beyond the F-35 and V-22, Raytheon says Jpals could support next-generation precision approach for the Air Force F-16, HH-60G Pave Hawk and U.S. Army Sikorsky UH-60 Black Hawk.

“If they wanted to do dispersed basing, maybe a small unit of F-35s in a remote location instead of having everybody together, we could put an expeditionary or mobile version Jpals at any airfield or any site,” Cleveland says. “It will give you precision landing to 20 cm [8 in.] on the runway and can control up to 50 airplanes with one system out to 20 nm.”

He says the system has a demonstrated reliability rate greater than 99% for automatic landings, including in harsh weather on pitching ships. The mobile version for land applications is based on a single Humvee with four GPS antennas and four UHF antennas. It can be air dropped from a Lockheed C-5M or Boeing C-17 and set up within 1 hr., Raytheon claims. The company will also pitch the concept to Army aviators at next month’s Association of the U.S. Army conference in Washington."

Source: http://aviationweek.com/afa-national-co ... ding-f-35a
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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neptune

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Unread post19 Sep 2017, 15:51

[quote="spazsinbad"][quote]Raytheon Pitches Jpals Precision Landing For F-35A.....Beyond the F-35 and V-22, Raytheon says Jpals could support next-generation precision approach for the Air Force F-16, HH-60G Pave Hawk and U.S. Army Sikorsky UH-60 Black Hawk....quote]

...MQ-25A???, etc..
:)
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spazsinbad

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Unread post19 Sep 2017, 16:02

Are you asking a question or making a statement - too cryptic for me. However many many reports have said that: like the X-47B before it, the MQ-25 will use the same JPALS system (which was an early version not qualified for human use).
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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Unread post10 Oct 2017, 14:45

Perhaps NOT all video relevant to this forum however we do see VX-23 Super Hornet carrying out initial flight ops aboard USS Ford including spooky EMALS catapults & AAG arrests. Last segment shows fire fighting training simulation in a hangar.

RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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Unread post13 Oct 2017, 15:42

RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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