Helmet-mounted displays

Cockpit, radar, helmet-mounted display, and other avionics
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lbk000

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Unread post17 Jul 2017, 21:59

Sorry, I thought since it was recent and I'd ask offhand by way of "bow blocking probe visibility".

I'll try searching better next time, thanks for the links.
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spazsinbad

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Unread post19 Jul 2017, 06:27

No worries. This forum has a lot of info/discussion over the last decade or so - some material not easily found now.
Officials Say Little About F-35 Helmet Glitch in Night Landing Video
19 Jul 2017 Hope Hodge Seck

"Officials with the Pentagon’s F-35 program office remain tight-lipped about a troubling issue with the Joint Strike Fighter‘s helmet night-vision camera that forced a test pilot to land “in a fog” on an amphibious ship last fall.

But they say improvements to the software in the pricey helmet are underway and will be ready for testing this fall.

The problem landing came to light this month, when the Flight Test Safety Committee posted videos from a May workshop in McLean, Virginia to its website.... [ https://www.youtube.com/watch?v=X3vbPEtSbv0 ]

...The landing was supposed to test the pilot’s ability to land vertically on the ship in low-light night conditions. But in the footage, the shape of the ship is almost entirely obscured through the helmet display, and the pilot repeatedly swings his head to the right, looking for any familiar landmarks to help him find the designated landing spot.

Erik Gutekunst, a flying qualities engineer who was in the control room for the landing, said in a video interview that he got the “heebie jeebies” recalling the specifics of that night. “Once [the pilot] got in the hover and had crossed over the spot, it became very clear that the picture he was working with was unsatisfactory for doing any sort of operation in very close vicinity of the ship,” he said.

Nick Bartlett, another flying qualities engineer, said it was “almost like a fog” for the pilot as he tried to peer through the display to find the ship. “As soon as he took off, the way he talked, I was like, ‘this is not good,'” he said.

A spokesman for the F-35 Joint Program Office, Joe DellaVedova, told Military.com only that the night-vision camera on the helmet display “did not perform as expected” under low light conditions and increased the pilot’s workload during landing.

“There are several software changes being made that will significantly improve the night-vision camera low light level performance,” he said. “These changes will be implemented in the next few months and available for testing this fall.”...

In his presentation, Fields [Marine Lt. Col. Tom Fields, F-35 government flight test director] gave credit to the pilot, who positioned himself on the flight deck using two generators he remembered walking past on his way to the aircraft. “I think his words later were, ‘screw you, ship, I’m landing on you,'” Fields said. “We got lucky. There is no way around it. We got very lucky that night.”"

PHOTO:"Video recently released by the Navy shows an F-35B pilot landing the aircraft "in a fog" aboard an amphibious ship in fall 2016 due to a problem with the night-vision camera on the helmet mounted display. (screen grab from U.S. Navy video)" https://www.defensetech.org/wp-content/ ... 77x437.jpg


Source: https://www.defensetech.org/2017/07/19/ ... ing-video/
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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 post21 Jul 2017, 06:58

Another 'BAD HELMUT' story with a video about HMDS III - SOON a fix already see below for this GLITCH? Anyone? Buehler?
F-35B helmet's night-vision camera failed during test flight
20 Jul 2017 Mackenzie Wolf

"The $400,000 helmet for the F-35B has a major problem: The night-vision camera does not work when there is no moon, according to video of a test flight aboard the amphibious assault ship America in November. The problem will take months to fix, said F-35 Joint Program Office spokesman Joe DellaVedova. Potential solutions are expected to be tested in the fall, he said....

...When an F-35B test pilot landed on the America during a moonless night in November, he was unable to see the deck, so he had to guess where he was above the ship, F-35B, Marine Lt. Col. Tom Fields, F-35 government flight test director, said in the video. After he had successfully landed, the pilot said something along the lines of, “Control, you’re going to have to give me a compelling reason to do that again,” Fields recalled."

Source: https://www.marinecorpstimes.com/articl ... -a-problem
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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SpudmanWP

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Unread post21 Jul 2017, 07:52

Why can't "reporters", especially ones that cover military hardware, do any "fact checking".

It was not a problem with the camera as no video feed was being provided, from any camera (helmet or dasboard), EODAS, or EOTS. In all likelihood it's a software issue. It was not a hardware issue of the HMDS either as the HUD data was being displayed.
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Unread post21 Jul 2017, 08:28

The Hope Hodge Seck story above has this: - it is confusing.
"...A spokesman for the F-35 Joint Program Office, Joe DellaVedova, told Military.com only that the night-vision camera on the helmet display “did not perform as expected” under low light conditions and increased the pilot’s workload during landing.

“There are several software changes being made that will significantly improve the night-vision camera low light level performance,” he said. “These changes will be implemented in the next few months and available for testing this fall.”..."
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 post21 Jul 2017, 11:01

It's the moon's fault. :D
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neptune

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Unread post21 Jul 2017, 15:41

spazsinbad wrote:The Hope Hodge Seck story above has this: - it is confusing.
"...A spokesman for the F-35 Joint Program Office, Joe DellaVedova, told Military.com only that the night-vision camera on the helmet display “did not perform as expected” under low light conditions and increased the pilot’s workload during landing...]


....not sure "Why" this was not "completely tested" at PAX, moonlight or not??? ....rushing to a first time on the boat was a bit much, software excuses or not!
:oops:
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Unread post21 Jul 2017, 15:50

All that is just conjecture on your part 'neptune' - do you have evidence for your claim? AFAIK there was a malfunction.
RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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SpudmanWP

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Unread post21 Jul 2017, 16:03

spazsinbad wrote: - it is confusing.


True that...

One thing that pushes me to the software side of things is that the image of "both" feeds (helmet & dashboard) were not missing... but just degraded. Watching the video you can clearly see the square dashcam feed is there but it's very dark (ie turned way down, bad contrast, etc) as was the helmetcam.
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Unread post21 Jul 2017, 16:17

Something that confuses me is that if it became a serious safety scare as the interviews made it out to be, why didn't he switch to DAS imagery to assist him?

Is DAS outright not certified / permitted for carrier recovery (if so - why? Because you can't see the painted lines on the deck)? Does the DAS imagery not stitch well / have sufficiently large FOV gaps (where it matters; looking under his nose gear) at those short distances? Was it unavailable to him due to a deficiency / glitch in that experimental software release? Did he just forget about it? Was he just that determined to fully evaluate the ISIE-11's + HMD? Was there a HMD projector / rendering issue and he wasn't seeing what we were seeing?

I'm sure there are reasons that make DAS less than ideal compared to the HCAM + FCAM; but if the ISIE-11's sensitivity was the culprit I would have thought switching to DAS would have been a safer option.
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Unread post21 Jul 2017, 17:18

How about rotating EOTS straight down, no FOV issue?
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neptune

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Unread post21 Jul 2017, 18:17

spazsinbad wrote:All that is just conjecture on your part 'neptune' - do you have evidence for your claim? AFAIK there was a malfunction.


..yes, the malfunction was taken an unproven system out to the boat and having it fail the test.

....by the way, that 1 meter square landing box that was reported repeatedly in use must require other systems; is JPALS one of them (anyone know?)?

... LHA6 America is the newest and should have been JPALS upgraded.
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Unread post21 Jul 2017, 18:43

No malfunction; NVC deficient in low lux levels. My guess is something to do with gain logic when there is a bright spot in the image under low light conditions.

A couple observations:

Deck edge lighting is clearly apparent. OLS is clearly apparent. HPI is clearly apparent. Can barely see the tram lighting (double lights used for line-up L/R). Appears that they were recovering to spot 9 as the jet is well aft of the visual positioning for spot 7 using the OLS and HPI...or the gent wasn't seeing what he expected and crossed aft of the intended spot. Or, maybe they were doing over-the-stern approaches and this still image simply depicts what he was seeing at that spot in the approach.

Seems this test pilot had no previous NVG experience on an amphib in low light conditions. Not sure what he was expecting, but ANVIS-9s are not much better in those conditions. Gotta rely on pattern numbers until one is close enough to see OLS; OLS glide slope goes away just inside 1/4 mile when one can pick up the HPI and other deck references.

Obtw, OLS= Optical Landing System (think Fresnel-like system on the tower); HPI= Hover Position Indicator (helps pilot know when he is in hover over spot 7. Is on the tower below the OLS); Tram= the double white lines on the deck used for line-up on STO or landing. Double lights that look like quotation marks at night).
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Unread post22 Jul 2017, 01:38

One Size Doesn’t Fit All at the MCAS Beaufort Pilot Fit Facility
19 Jul 2017 LM PR

"...At Marine Corps Air Station (MCAS) Beaufort, the Pilot Fit Facility (PFF) ensures every F-35B pilot has tailored flight equipment specially fit just for them. This includes everything from the G suit and flight jacket, to the 3D molded F-35 helmet. Mike Casazza, a retired Marine, works in the PFF and brings more than 20 years of flight gear experience to the job. But the gear he works with now is like nothing he has ever seen before.

“There is no other gear as custom fit for each pilot as this is,” said Mike. “I think aircrew comfort was overlooked in the past, but the F-35 gear is a lot better for the crew member and gives the warfighter what he needs to do his job.”

New pilots who haven’t flown legacy aircraft don’t have anything to compare it to, but transition pilots with hundreds or even thousands of flight hours rave about the new gear. That’s not only a testament to the design and engineering of the equipment, but also the great work done by the PFF team. There are a lot more options for sizing with the F-35 gear, so the pilots rely on the experience of Mike and his team to get the best fit possible.

“The biggest difference I’ve seen from legacy gear to F-35 is the difference in sizing,” said manager of the PFF, Lee Tincher. “With legacy gear, you have three to four sizes, whereas the F-35 has 20 sizes and a custom fit helmet.”

The custom fit helmet is developed using a head scanner that precisely measures the pilots head, molding the helmet down to the exact millimeters of the individual pilot’s head. The scanner has six low intensity lasers and 12 cameras that create a 3D model of the pilot’s head that they use with a 3D model of the helmet to get the exact fit on the pilot’s head.

Once a pilot receives the fitted helmet, he goes through the helmet mounted display (HMD) alignment. This aligns the camera built into the helmet with the pilot’s eyes and enables the helmet to display everything necessary in a crisp, easy to read image...."

Scanner Photo: https://www.f35.com/assets/uploads/images/scanner.jpg

Source: https://www.f35.com/in-depth/detail/one ... t-facility
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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 post25 Jul 2017, 04:26

I was really disappointed in the article above from LM about the HMDS Helmet. It does not mention the helmet liner specifically fitted to the individual F-35 pilot which can then be taken to any suitable helmet to be fitted again. Anyhoo...

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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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