Forum: General F-35 Forum

Some Suggested (and Unreported) Issues on the F-35 October 20, 2011 Winslow Wheeler

http://www.cdi.org/program/document.cfm ... /index.cfm

"...3) Despite at least one media writer’s descriptions of impressive landing parameters [? I thought it was STO? - whatever - anyone know about this comment?] during the displays, I am informed that the effects of the Wasp’s structure were causing the ship to slow down because the handling qualities resulting from the wind coming around that structure were not what they expected...."

[AFAIK crosswind component landings were performed so that would account for that little hiccup - and so what - sheesh what a grrl.]

...a. The ejection seat and pilot escape system in the jets have not passed the required qualification tests. This is a particularly interesting because one media writer just reported on how the Air Force’s Air Combat Command is considering a change in the manufacturer for the ejection seat, but the explanation is that it is for cost reasons. It is asserted that a change at this late stage would save money, but how is unclear and appears, at least to me, controversial.

b. There are problems with being able to restart the engine in flight if it flames out.

c. Braking on a wet runway is deficient—recently improved but not resolved; so jets will be restricted from flying after it rains until the runway dries out...."

Let us all toss in the towel then. It is just too difficult. Twisted Evil

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It looks like grasping at straws to me. Laughing

Sheesh! It's like Wheeler expects a perfect airplane straight off the drawing board!

In the meeting room with his colleagues/underlings....

Bill: "Curses!!! It didn't melt the deck and they're actually saying its GOOD!!! I want each of you to come up with 5 new, "unannounced" f-35 problems by the end of the week. Next.... has anyone spotted the TR-3B yet?"

Amy: "*chuckle* no"

Bill: "CURSES!!!!!!"

oops realidsed we're talking about winslow, not bill

Winslow Wheeler. LMAO

Yoo-hoo, McFly (WW) this isn't OT, this is still DT. If they had to do regression testing on a hover pit after the fix then the ship wasn't the place to get it done. Rolling Eyes

Test points around a nominal wind star (that's the allowable wind envelope for launch and recovery) are a fundamental part of the test plan. They started with a basic cq envelope and they'll grow it some more in DT-2. Right hand winds have always been tricky (they remain so today for Harrier ops) and that's why they spend some time making sure they know where the limits are -- that's part of what initial ship trials in DT are for. Doh

And, obtw for all who have never been in an operational squadron (WW) airplanes 'break' all the time -- WW should name one that doesn't.

That was an interesting (and good) post Quicksilver.

Diagram from a PDF about V-22 testing but relevant nevertheless I hope:

V-22 Aeromechanics: Shipboard Compatibility Issues 29 June 2001
Kurt Long | NAVAIR 4.11 | Patuxent River MD

www.g2mil.com/TRAAC_Shipboard_OPS.pdf (0.5Mb)

I'll bet the F-35 hovered in place while the Wasp positioned itself underneath the jet, then used its "trackor beam" to bring it down.

BEAM ME DOWN Scottie! Very Happy

Spaz,

Excellent diagram Not Worthy

; visually explains the "Bee" pulling abeam the LZ and slipping into position, rather than lining up astern and creeping thru the "uplift flow" from the stern of the deck.; nice Salute

This 'STERN' approach will be an issue for an potential any F-35B SRVL use (maybe not on an LHA but on an equivalent elsewhere). The 'burble' for conventional carrier landings can be significant and will change with 'wind down the angle direction & speed' and carrier configuration (class). There are so many variables compared to static runway landings eh. A lot of this guff is explained - or pointed to - in the 'how to deck land' PDF if youse are interested.

'bager1968' is a knowledgeable ex-USN chap:

http://warships1discussionboards.yuku.c ... nts?page=3

"That blah-blog [this thread topic] looks to me like more of the normal "blow up every minor occurance into a major disaster) rant...

For example: "Apparently, the two F-35Bs involved in the sea trials had been diverted to Patuxent River to be repaired the previous week—presumably for fixes the crew on the Wasp were unable to perform."

Since Wasp has no F-35B maintenance equipment or tools aboard, and since none of its crew are trained F-35B maintainers, then OF COURSE they couldn't fix them! "

Quote:

Some Suggested (and Unreported) Issues on the F-35 October 20, 2011 Winslow Wheeler

b. There are problems with being able to restart the engine in flight if it flames out.

The F135 will be the most advanced aviation gas turbine EVER.... guess the key here is that it should NEVER quit in the first place?
(Most us engine folk take this personal!)

Quote:

The F135 team has also issued a contract of its own to Diagnostic software maker Qualtech Systems Inc. of Wethersfield, CT to provide real-time on-board diagnostics for its jet engines. The contract calls for Qualtech Systems to provide fault isolation development software tools and an an on-engine "diagnostic reasoner" as part of Pratt & Whitney's Joint Strike Fighter Engine Prognostics & Health Management (PHM) Program.

PHM will make use of electrostatic and other sensors to monitor such parameters as debris generation, vibration, blade health and lubricating-oil quality. The suite of sensors will constantly monitor approximately 500 data streams, which will be integrated with the F-35's own systems. The complete PHM system has been developed in partnership with NASA Ames, which created vital data-fusion algorithms, NASA Dryden and NASA Glenn, with flight development to be carried out with a C-17. As noted previously, the aim is to predict the need for inspection or parts-replacement, so that, via a satellite link, the airbase or aircraft carrier knows the engine health before the aircraft returns from its mission.

Like most modern fighter jet engines; You're likely to NOT get a motor restarted after a serious malfunction, if it's serious enough to kill it in flight, it's serious enough for it to not relight.

My Two Cents

TEG

Forum: General F-35 Forum

Some Suggested (and Unreported) Issues on the F-35 - Wheeler