Tour a Citation CJ3 Williams FJ44-3A Engine Tour at Cessna Service Center in Wichita, Kansas

Take a look behind the cowlings of a Williams FJ44-3A Citation CJ3 jet engine.
CORRECTIONS:
👉 Bypass popout pin is for impending oil filter bypass, not 'fuel bypass'..
👉 Only pointed out the left side N2 bleed line, and not the right one that joins it in the "Y" fitting...
👉 Cookie Cutter mixing vanes in exhaust are primarily for noise reduction, not thrust.
This fanjet engine is powerful! You really feel the thrust of these babies (2,820 lbs at Sea Level) when you set the throttles to takeoff power.
CJ3 Engine Short: • Williams FJ44-3A engin...
More specs on the CJ3: www.globalair....
Wiki FJ44: en.wikipedia.o...
"FJ44-3A: 2,820 lbf (12.5 kN) thrust, 2004 introduction, similar to the -2A with a larger fan and dual channel FADEC unit."
#citationjet #cessna #fanjet #jetengine #avgeek

[@ramonfernandez9508]

Excellent explanation. Can You comment more about torque and RPM generated in the N1 fan? Thank you very much.I subscribe for a new video about it.

[@PersonalWings]

(This detail is for this engine - other turbines have variable number of stages, etc.)
The N1 fan, by itself doesn't add torque. It is comprised of the fan, and a three-stage axial intermediate pressure compressor. We sometimes just call it 'the fan'. Its purpose is the 'first stage' and in addition to producing a low-pressure area to bring more air into the engine, its 'exhaust' is actually compressed air that then is passed to the remaining sections of the engine. More accurately N1 would be the RPM of those components.
N2 is the RPM of the single-stage compressor and single-state turbine, however we usually refer to the components at N2.
The RPM of these components (N1) operate at 22,500 RPM and the N2 51,500 when the engine is at 100%.
This isn't an exhaustive engineering discussion, but hopefully answers some questions.

[@leokimvideo]

I never knew about the special design of the exhaust nozzle, wow looked magical

[@PersonalWings]

Look at our Pratt engine video from NBAA BACE, some cool facts about the exhaust fins and why they use that shape.

[@vernonvancleve4316]

Great video! This really helped with application of knowledge while I'm learning the CJ3.

[@PersonalWings]

Thanks. We did the video quickly and you may discover some minor errors :) You will love the CJ3. I've been flying and teaching in them for 10 years, flying them several times a month. Definitely a well-designed airplane.

[@eprohoda]

Presonal~ hi-you made interesting ,

[@PersonalWings]

Thanks.

[@jamesward-ld5zl]

Bypass popout pin is for impending oil filter bypass, not 'fuel bypass'..
Only pointed out the left side N2 bleed line, and not the right one that joins it in the "Y" fitting...
Cookie Cutter mixing vanes in exhaust are primarily for noise reduction, not thrust.

[@PersonalWings]

Thanks! Yes, that pop-it is for the OIL FILTER BYPASS if it has occurred. Good call on the rest!

[@DanFrederiksen]

Do you happen to know who makes the bearings for it? are they off the shelf from known bearing makers or some special stuff. According to GPT, SKF and others do make bearings for small jets.

[@PersonalWings]

Dan, sorry I don't know the specifications for the various bearings on their engines.

[@DanFrederiksen]

@@PersonalWings ok thanks. I've found that SKF produces for some engines and the bearings appear to be relatively conventional, borderline unremarkable. I thought they would have to be some crazy high standard or unique materials.