F-35C being test aboard aircraft carrier USS Abraham Lincoln

[spazsinbad]

BeGeez BeGollee I wonder wot is being tested? Nose Gear Catapulting Arrangements effect on HMDS III anyone? Beuller?

F-35C Lighting II aircraft being tested aboard the aircraft carrier USS Abraham Lincoln (CVN 72)
04 Sep 2017 DVIDS

PHOTO: "ATLANTIC OCEAN (Sept. 4, 2017) Sailors prepare two F-35C Lightning II aircraft assigned to the Grim Reapers of Strike Fighter Squadron (VFA 101) to launch on the flight deck of the Nimitz-class aircraft carrier USS Abraham Lincoln (CVN 72). Abraham Lincoln is underway conducting training after successful completion of carrier incremental availability. (U.S. Navy photo by Mass Communication Specialist 1st Class Josue Escobosa/Released) https://www.dvidshub.net/download/image/3744286 (1Mb)
&
https://www.dvidshub.net/download/image/3744297 (1.1Mb)

Source: https://www.dvidshub.net/image/3744297/ ... oln-cvn-72

[zerion]

JPO Fixing F-35 Oxygen, Carrier Landing, Software Glitches: VADM Winter
By SYDNEY J. FREEDBERG JR.
on September 07, 2017 at 2:02 PM

...
The program’s adjusted the helmet display, Winter said. It’s also retrained pilots and made minor adjustments to fix the intense vibration during catapult take-offs (“cat stroke”). There’s no need for a costly and time-consuming redesign of the aircraft’s nose landing gear, as some had thought...

http://breakingdefense.com/2017/09/jpo- ... dm-winter/

[alloycowboy]

JPO Fixing F-35 Oxygen, Carrier Landing, Software Glitches: VADM Winter
By SYDNEY J. FREEDBERG JR.
on September 07, 2017 at 2:02 PM

...
The program’s adjusted the helmet display, Winter said. It’s also retrained pilots and made minor adjustments to fix the intense vibration during catapult take-offs (“cat stroke”). There’s no need for a costly and time-consuming redesign of the aircraft’s nose landing gear, as some had thought...

http://breakingdefense.com/2017/09/jpo- ... dm-winter/

Zerion..... I think you failed todays reading test. LOL

From the article:

"Two Navy F-35C squadrons (VFA-101 and VFA-125) now have both sets of fixes and are going through carrier qualifications with them aboard the USS Abraham Lincoln, Winter said. This isn’t a test specially arranged for the F-35 program, he emphasized. It’s pilots going through their routine training, using the improved gear and providing feedback on it.

[SpudmanWP]

"using the improved gear " is talking about the helmet and NOT the nosegear.

[blindpilot]

From the article:
"Two Navy F-35C squadrons (VFA-101 and VFA-125) ... .. Winter said. This isn’t a test specially arranged for the F-35 program, he emphasized. It’s pilots going through their routine training, using the improved gear and providing feedback on it.

That's actually more encouraging, than any fixes, since it reflects the USN starting to cycle up for operations ... IE. getting pilots qual'ed.

MHO
BP

[spazsinbad]

The imprecision of spokespeople about the F-35 (now the F-35C) and the INABILITY of reporters to clarify potential misunderstandings by either reporting in plain English so that everyone understands or ask spokespersons questions. DUH!?

I reckon conglomerating reporters/spokespeople we have both HMDS & nose gear fixes (if any - which may have been so slight as to not merit detailing by said spokies peeps - I dunno - it gets too difficult very quickly - but sh*t happens eh.).

[blindpilot]

One nugget of info that hopefully is true.

... "Operational testing – run by the Pentagon’s notoriously tough and independent Director of Operational Test & Evaluation – will start in February. Winter doesn’t expect DOT&E to find new software problems, but the program stands ready to fix 3F if necessary."

This is a change from Gilmore's "June at the earliest," and would seem to be ahead of critical "final dots on "I"s and crosses to "T"s," (ie, MDF, available 3F test airframes etc.)

MHO
BP

[Dragon029]

https://insidedefense.com/insider/navy- ... icane-irma

They achieved 1 (apparently very productive) day of testing before having to head back to Norfolk for safety. Very interestingly though:

"They had a very productive day," he said. "We had the test pilots wearing the new helmet with the new organic LED configuration to assess the green-glow fix." Green-glow typically occurs at night and makes it difficult for pilots to see certain objects.

The Navy deems the O-LED helmet "acceptable," but Winter said the new configuration needs to be tested in darker conditions at sea.

[spazsinbad]

[SpudmanWP]

Will someone with better eyes than I see if the launch oscillation looks better?

[spazsinbad]

I was just commenting via e-mail on that aspect however we must remember all current USN catapult jet aircraft do the 'bobble'. What has been minimized as we have been told via TAILHOOK 2017 videos is that reducing the 'holdback' force has reduced the initial up and down which was the problem. No one expects a NObobble catapult methinks. Whether the 'bobble' is better compared to previous 'catapult bobbling' would require some comparison from the same camera angle at the same known aircraft weight at the same known launch conditions otherwise - WOD & endspeed if not a test - but say the problematic CarQual catapult conditions. Believe the pilots (test & otherwise) in the HOOK '17 videos I suggest.

Thanks to 'Dragon029' for the HOOK'17 video excerpts first posted on another thread viewtopic.php?f=22&t=53438&p=376137&hilit=compressed#p376137 this one below explains some cat stuff.

Catapult Ride Quality comments start from minute 2 & 50 seconds....

[spazsinbad]

LINCOLN olde schoole 4 arrestor wires with barricade sheave empty (just aft of no.4 wire) with F-35C in the 'spaghetti':

"170904-N-UX312-0057 ATLANTIC OCEAN (Sept. 4, 2017) An F-35C Lightning II assigned to the Grim Reapers of Strike Fighter Squadron (VFA) 101 lands on the flight deck of the Nimitz-class aircraft carrier USS Abraham Lincoln (CVN 72). Abraham Lincoln is underway conducting training after successful completion of carrier incremental availability. (U.S. Navy photo by Mass Communication Specialist 3rd Class Matt Herbst/Released) "
STORY: http://www.navy.mil/submit/display.asp?story_id=102331
Photos:
http://www.navy.mil/management/photodb/ ... 2-0057.JPG
&
http://www.navy.mil/management/photodb/ ... 7-0103.JPG [looks like No.2 wire arrest]

Could be the arrest photos are a series of this one No.2 wire arrest - more photos at the STORY URL above

[mor10]

I was just commenting via e-mail on that aspect however we must remember all current USN catapult jet aircraft do the 'bobble'. What has been minimized as we have been told via TAILHOOK 2017 videos is that reducing the 'holdback' force has reduced the initial up and down which was the problem. No one expects a NObobble catapult methinks. Whether the 'bobble' is better compared to previous 'catapult bobbling' would require some comparison from the same camera angle at the same known aircraft weight at the same known launch conditions otherwise - WOD & endspeed if not a test - but say the problematic CarQual catapult conditions. Believe the pilots (test & otherwise) in the HOOK '17 videos I suggest.

Thanks to 'Dragon029' for the HOOK'17 video excerpts first posted on another thread viewtopic.php?f=22&t=53438&p=376137&hilit=compressed#p376137 this one below explains some cat stuff.

Catapult Ride Quality comments start from minute 2 & 50 seconds....

Since we are talking about human comfort, and not aircraft handling qualities, we just need to measure what happens to the pilot. A simple way to do it would be for each of the pilots to have a smartphone, which all have accelerometers these days, in a designated pocket in their flight suites, with an app that records the accelerations they are exposed to during launch. A simple csv file is stored on the phone that can be downloaded every so often. A rig to create a baseline for the accelerometers in each phone would also be needed. I can have that app made for less than $5K.

[spazsinbad]

Can it measure the vertical acceleration? I'm not sure why it is needed though if the problem is solved according to users.

[krorvik]

It sure can. One needs to take into account the precision of those devices though - and the calibration. Unsure how good the measurement would be.