F135 Upgrades, Reengining Considered In New F-35 Propulsion

All about the Pratt & Whitney F135 and the (cancelled) General Electric/Rolls-Royce F136
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alloycowboy

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Unread post11 Oct 2021, 20:14

Here is an interesing article about Pratt & Whitney’s GatorWorks.

Pratt & Whitney’s GatorWorks to 3D print entire jet engine

The first time Pratt & Whitney’s GatorWorks attempted to 3D-print a combustor for the miniature TJ-150 jet engine, the results were anything but perfect. Lessons learned, the West Palm Beach, Florida-based outfit is now taking additive manufacturing one step further: attempting to produce a TJ-150 turbine entirely out of 3D-printed ...

https://www.flightglobal.com/fixed-wing/pratt-and-whitneys-gatorworks-to-3d-print-entire-jet-engine/145813.article
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zhangmdev

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Unread post11 Oct 2021, 21:02

Seemingly GE was responding to this section of House defense policy bill. Basically there isn't such a strategy. They are asking about how much it will cost to achieve the goal to integrate and retrofit by that time frame. Typical grandiose plan detached from reality. First to finish the ground testing, then to install it on a flying F-35 to certify it can power full flight envelope, then setup the production line. All done in 5 years? Not impossible, but very very improbable.

https://www.congress.gov/bill/117th-con ... WjcnBszQhl

SEC. 232. ADAPTIVE ENGINE TRANSITION PROGRAM ACQUISITION STRATEGY FOR
THE F-35A AIRCRAFT.

(1) A competitive acquisition strategy, informed by fiscal considerations, to
(A) integrate the Adaptive Engine Transition Program propulsion system into the F-35A aircraft; and
(B) begin, in fiscal year 2027, activities to retrofit all F-35A aircraft with such propulsion system.
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Unread post11 Oct 2021, 23:26

@zhangmdev, pretty much agreed with everything you said there. Only we have a wild card in play with the sixth-gen fighter test aircraft. Does this test aircraft have the first flying three-stream adaptive cycle engine? We don't know?

This article dropped on Oct 8th.

NGAD: USAF's sixth generation fighter is on schedule, acquisition official says

https://www.aero-mag.com/next-generation-air-dominance-11102021
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Unread post13 Oct 2021, 09:28

spazsinbad wrote:Seriously. However I do not see the 'image' just an icon and nothing else? How SHORT does the HOOK have to be? :shock: I'll post a pic of the F-35C from the side at OAO Optimum Angle of Attack over the wires/spaghetti almost at touchdown. :shock:

PHOTO not here anymore and this is a ZOOM of F-35C OAO wires hook DT-1 USS Nimitz (I'll find proper overall pic soon). http://www.navy.mil/management/photodb/ ... 66-050.JPG

https://1.bp.blogspot.com/-aDkVQgHpq0I/ ... anding.jpg (0.9Mb)

F-35c Arrest Nimitz Nov 2014 Slow Motion https://www.youtube.com/watch?v=QdoEb14-HZw

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Unread post13 Oct 2021, 18:09

AvWeek behind a firewall —

https://aviationweek.com/defense-space/ ... 9b33a9308c

“A shortage of Pratt & Whitney F135 engines that is already keeping more than four dozen Lockheed Martin F-35s grounded will continue to worsen. The year-old crisis has driven some lawmakers to call for replacing the F135 with an advanced new engine.”
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steve2267

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Unread post13 Oct 2021, 18:28

quicksilver wrote:AvWeek behind a firewall —

https://aviationweek.com/defense-space/ ... 9b33a9308c

“A shortage of Pratt & Whitney F135 engines that is already keeping more than four dozen Lockheed Martin F-35s grounded will continue to worsen. The year-old crisis has driven some lawmakers to call for replacing the F135 with an advanced new engine.”


So.... Congress does not fund proper maintenance of the F-35 (i.e. depots) and/or the services fail to standup the maintenance depots fast enough to sustain the F-35's purchased per their chosen maintenance model... and the solution is to throw the engine manufacturer under the bus and throw BILLIONS of dollars at a new powerplant?

LMAO

Cannot make this sh*t up. Rep. Smith oughta be ashamed of himself. But I doubt he is. He may not even be cognizant of the problem created (or exacerbated) by his peers.
Take an F-16, stir in A-7, dollop of F-117, gob of F-22, dash of F/A-18, sprinkle with AV-8B, stir well + bake. Whaddya get? F-35.
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zhangmdev

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Unread post13 Oct 2021, 18:36

Further proof that lawmakers are a few crayons short of a full box or corrupt, most likely both.
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Unread post13 Oct 2021, 21:20

Don’t worry steve. Have a beer or refreshing beverage of your choice and kick back. This is the only thing the government has gotten wrong.

:whistle:
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steve2267

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Unread post13 Oct 2021, 21:42

I shall do just that after I get done fighting with AutoCAD. ... Unless this POS software drives me to drink first...
Take an F-16, stir in A-7, dollop of F-117, gob of F-22, dash of F/A-18, sprinkle with AV-8B, stir well + bake. Whaddya get? F-35.
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Unread post15 Oct 2021, 15:48

F-35 Engine Rivals Prepare For Another Clash
15 Oct 2021 Valerie Insinna

"General Electric could find itself in a contest with incumbent Pratt & Whitney for a replacement for the F-35's engine.

MIDDLETOWN, CT.: As the Pentagon looks to increase the power of the F-35 joint strike fighter’s engine while cutting costs, Pratt & Whitney and General Electric could be less than a year away from finding themselves in a rematch over the future of the stealth fighter’s propulsion system....

...the F-35 will need an improved engine to support oncoming Block 4 enhancements that will make the jet more lethal, and department officials are contemplating whether another competition between the former rivals could lead to a massive leap forward in engine capability, at a price the services can afford.

“I love competition,” Lt. Gen. Eric Fick, who leads the Pentagon’s F-35 program office, said Sept. 15. “I’m a big fan of having two viable fighter engine manufacturers in the defense space. What we need to figure out, I think, as an enterprise is: Are we willing to pay the cost associated with [a new engine].”

General Electric Aviation is pitching its XA100 adaptive cycle engine, which the company is developing as part of the US Air Force’s Adaptive Engine Transition Program. The XA100 is “drop in” compatible with the F-35A conventional variant used by the Air Force and most international customers, as well as the F-35C carrier variant, said David Tweedie, GE’s head of advanced combat engines. However, the XA100 would have to be majorly modified for use on the F-35B, which can vertically take off and land.

While Pratt & Whitney also has an adaptive engine in the works, the company is proposing an upgraded version of the F135 that it believes will offer the Pentagon the most bang for its buck, said Jen Latka, Pratt & Whitney’s vice president for the F135 engine program. The enhanced F135 would be applicable to all variants of the jet, giving an increase in thrust and power management without forcing the services to field a new engine — or leading to a mixed fleet of adaptive engines and F135s.

The Pentagon’s F-35 joint program office is charged with compiling future engine requirements from the US Air Force, Navy and Marine Corps. Within the next six to 12 months, the office plans to carve out a path forward for either upgrading the F135 or starting an engine competition, Fick said.

Much will depend on whether the Air Force continues financing development of Pratt and GE’s adaptive engines, and whether the service is willing to pay the increased engineering, procurement and sustainment costs associated with having a different engine than the rest of the F-35 enterprise, Fick said.

“We know that beyond Block 4, we are going to need more power” and cooling, he said. “We know that we need to start [determining a path forward] so that we can put a solution set in place for all aircraft, for all customers.”

General Electric’s proposal... [BEST READ at source - seen it all before above]

...Pratt & Whitney’s proposal... [BEST READ at source - seen it all before above]

Photo: "The F135 engine powers the global F-35 fleet, but may face a competitor in the future. (Nicolas Myers/US Air Force)" https://sites.breakingmedia.com/uploads ... 237977.jpg


Source: https://breakingdefense.com/2021/10/f-3 ... her-clash/
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