F135 testing resumes at Arnold

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

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Unread post18 Nov 2020, 04:02

F135 testing resumes at Arnold
16 Nov 2020 Jill Pickett, AEDC/PA

"ARNOLD AIR FORCE BASE, Tenn. -- Testing of the Pratt & Whitney F135 engine has resumed in the Arnold Engineering Development Complex J2 Engine Test Cell at Arnold Air Force Base. The test team is seeking to validate the structural integrity and aerodynamic characteristics of a new fan rotor design for the F135, the powerhouse of the F-35 Joint Strike Fighter (JSF) Lightning II.

In J2, altitudes up to 75,000 feet can be simulated, along with temperatures from -60 to 450 degrees Fahrenheit. Flight speeds of up to Mach 2.6 can also be simulated. Testing of the engine began in J2 in 2019, but was stopped because of a planned outage to accommodate maintenance. Once that outage concluded, testing resumed with an expectation to continue into early 2021.

“Test results to date have been positive and encouraging, and early results allowed us to complete an AMT (Accelerated Mission Test) with the same newly-designed rotor,” said 2nd Lt. Gregory Landrum, AEDC Jet Engine Test project manager.

“The test team that has been conducting this test has been highly involved and has worked closely with personnel from Pratt & Whitney and the JSF Joint Program Office to frame the desired objectives and collect data toward those objectives.”

The F135 program has conducted more than 5,500 hours of testing in test cells across AEDC."

Photo: "Testing of an F135 engine with a new rotor design is continuing in the J2 test cell of the Engine Test Facility at Arnold Air Force Base, Tenn. The engine is shown in the test cell in this image taken Sept. 2, 2020. (U.S. Air Force photo by Jill Pickett)" https://media.defense.gov/2020/Nov/16/2 ... 1-1021.JPG (11Mb)


Source: https://www.robins.af.mil/News/Article- ... at-arnold/
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lamoey

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Unread post18 Nov 2020, 05:08

Any information available about why there is a need for a new rotor?
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spazsinbad

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Unread post18 Nov 2020, 05:31

It seems to extend engine life according to this 24 Jan 2020: F-35 engine back on test with new fan rotor
"...Testing of the F135, which is sponsored by the F-35 Joint Program Office, is set to continue into 2020. “We are going to be testing it a little bit beyond its normal service life to collect data to support the decision makers with regard to extending the service life of the engine out in the field,” Corona added." https://www.aerospacetestinginternation ... rotor.html

Has the engine fire on take off at Eglin AFB relevance?:
05 Jun 2015 "A fractured engine rotor caused an F-35 to catch fire during takeoff for a training mission last summer, according to an Air Force investigation released Friday...." https://www.airforcetimes.com/news/your ... f-35-fire/
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Unread post18 Nov 2020, 13:13

spazsinbad wrote:Has the engine fire on take off at Eglin AFB relevance?:
05 Jun 2015 "A fractured engine rotor caused an F-35 to catch fire during takeoff for a training mission last summer, according to an Air Force investigation released Friday...." https://www.airforcetimes.com/news/your ... f-35-fire/


The underlying problem that caused the summer 2014 fire was reported as being fixed by Pratt & Whitney in 2015:
https://www.ainonline.com/aviation-news ... hter-fleet
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quicksilver

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Unread post18 Nov 2020, 13:14

That photo appears to be a -600 STOVL engine; it features both an offtake of LP bypass air for the roll post, as well as the rotational feature of the 3BSD.
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Corsair1963

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Unread post19 Nov 2020, 06:38

Sure this doesn't relate to future upgrades planned for the F135???
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Unread post21 Nov 2020, 03:28

quicksilver wrote:That photo appears to be a -600 STOVL engine; it features both an offtake of LP bypass air for the roll post, as well as the rotational feature of the 3BSD.


Yep. concur. proper Sawed off exhaust petals as well
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