F135-600 power rating?

All about the Pratt & Whitney F135 and the (cancelled) General Electric/Rolls-Royce F136
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by geforcerfx » 18 Jul 2018, 04:54

So I find some conflicting data on the power rating for the -600 variant (stovl) most of the stuff I have seen from Pratt say it's 41,000lbs in max burner and 27,000lbs in mil power, the -100 being 43,000lbs and 28,000lbs. So then I see the T/W for the B version listed in a few places and they typically have it listed at .90 for full fuel, but at the loaded weight I figured(47,700lbs) that's showing a 43,000lbs max thrust, 41,000lbs put it at .86 (just behind the A's .87). So I would assume Pratt is not lying and the -600 is 41,000lbs so the loaded T/W is somewhere just beneath the A versions correct?


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by spazsinbad » 18 Jul 2018, 05:08

There are all kinds of numbers out there and this detail has been discussed before. But hey find where eh....

STOVL PROPULSION SYSTEM DESIGN
Maximum Thrust (in pounds): 43,000 (191.3 kN)
Short Takeoff Thrust: ----------38,100 (169.5 kN)
Hover Thrust --------------------39,400 (175.3 kN)
Main Engine: --------------------15,700
Lift Fan: -------------------------20,000
Roll Post: -------------------------3,700

http://www.f135engine.com/proven-tech/e ... cter.shtml
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Engine Characteristics
Maximum thrust class ------41,000 pounds (182.4 kN)
Intermediate thrust class -27,000 pounds (120.1 kN)
Short takeoff thrust class 40,740 pounds (181.2 kN)
Hover thrust class ---------40,650 pounds (180.8 kN)
Main engine ----------------18,680 pounds (83.1 kN)
Lift fan ---------------------18,680 pounds (83.1 kN)
Roll post ---------------------3,290 pounds (14.6 kN)

http://www.pw.utc.com/static/img/me_f13 ... 777937.pdf
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Same as immediately above so wont format it:
Maximum Thrust Class 41,000 lbs (182.4 kN)
Intermediate Thrust Class 27,000 lbs (120.1 kN)
Short Take Off Thrust Class 40,740 lbs (181.2 kN)
Hover Thrust 40,650 lbs (180.8 kN)
Main Engine 18,680 lbs (83.1 kN)
Lift Fan 18,680 lbs (83.1 kN)
Roll Post 3,290 lbs (14.6 kN)

http://www.pw.utc.com/Content/F135_Engi ... sChart.pdf
__________________________________________________________________

LM Fast Facts: 2012
F135-PW-600
38,000 lbs Max.
26,000 lbs Mil.
40,500 lbs Vertical
_________________

LM Fast Facts: Jul 2018
F135-PW-600
40,000 lb Max.
25,000 lb Mil.
40,500 lb Vertical


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by spazsinbad » 18 Jul 2018, 05:38

I'll find this quote in the forum quite a few times - for the moment this text block will suffice: Kjelgaard author.

Same orfer but JULY 2014 mit PDF: viewtopic.php?f=56&t=25691&p=274954&hilit=Kjelgaard#p274954

Go here for links & the 2012 PDF itself: viewtopic.php?f=56&t=52566&p=395986&hilit=Kjelgaard#p395986

StevieWunda gets a legin: viewtopic.php?f=22&t=52450&p=356765&hilit=Kjelgaard#p356765

WeryOldOrfer 2007: viewtopic.php?f=22&t=14082&p=176427&hilit=Kjelgaard#p176427
"...The Rolls-Royce LiftSystem
One of the most remarkable features of the F-35 programme is that when the STOVL F-35B is hovering, its propulsion system produces very nearly as much thrust without afterburner as the engine does in forward flight with its afterburner fully lit. The F-35B’s engine has to produce 39,400lb (176kN) of vertical thrust without afterburner in hover mode, while in conventional flight it produces 28,000lb (124.55kN) of dry thrust and 43,000lb (191.27kN) with full afterburner.

The F135-powered F-35B relies on two systems to achieve the high level of vertical thrust. First is its full authority digital engine control (FADEC) unit – computers made by BAE Systems and attached to the engine, but running on Pratt & Whitney proprietary FADEC software. In hovering flight, the FADEC computers make the engine work harder, allowing it to increase dry thrust from 28,000lb to 39,400lb without using afterburner….
&
...When the F-35B is hovering, the driveshaft delivers 28,000 shaft horsepower to the LiftFan’s clutch-and-bevel-gear system so that the LiftFan provides 20,000lb (124.55kN) of downward thrust as a column of cool air. (In the F-35B’s hover mode the coupled F135 - driveshaft arrangement acts exactly like a turboprop engine, except that most of its power
output is used to drive air vertically rather than horizontally, so the F135 is actually the world’s most powerful turboprop engine when installed in the F-35B.) In hover mode another 15,700lb (69.84kN) of thrust exits the engine exhaust as hot gas and is directed downwards at the rear of the aircraft by the aircraft’s three bearing swivel module (3BSM)….
&
...In the F-35B, 3,700lb (16.46kN) of thrust in the form of bypass air is directed out to the two roll posts while hovering...."



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