Orenda 14 fuel pumps - a look inside

[lexichronicle2]

That reminds me of taking the pressure washer apart :P

What pressure range do these typically output?

I know a lot of the more expensive pressure washers use ceramic liners on the pistons to avoid wear.

Some guys who cast metals at home look at burning waste oil. To produce a blue cone, I thought about forcing the waste oil through the orifice with a pressure washer, as the higher pressure should reduce droplet size to um - google for high pressure fog nozzles for an example (terrariums etc).

[Migueldeservantes]

A M P+ Air frame and Power plant Mechanic. Love your work! and I'm about to finish this College term! I haven't have forgotten you! I have been looking for T's and Caps to send ! Thanks for all your videos!

Marco

[117nathanmyers]

I need to stop watching your videos and do my homework so I can get into a good college to get a good job designing/working on engines. Is there some kind of fuel regulator after the fuel pump but before injectors? If there is not how would one control if the engine is running too rich or lean? or can a gas turbine run rich or lean? Would this regulator also determine the throttle? If it doesn't have some kind of regulator how would it control the air fuel mix? Sorry for all the questions.

[AgentJayZ]

@117nathanmyers you're ready to watch the next video now... it's the one I uploaded Nov 28

[117nathanmyers]

@AgentJayZ haha... thanks

[PLUSHAIRPLANECARPET]

theres some really beautiful machining work in there

[Spike0907]

Hey, thanks for the name check - twice! Made my day.

[tranceaddict704]

Any chance of doing a video in front of the whiteboard?

[AgentJayZ]

@tranceaddict704 When the opportunity arises, I'll get on it.

[tranceaddict704]

When they say it's a " geared " turbofan, what exactly does that mean? Forgive my ignorance

[AgentJayZ]

@tranceaddict704 Exactly... requires a very long answer, and maybe a video in front of a whiteboard.

But basically it is a way of making an engine with two turbines turning at their own optimum rotational speeds able to use three compressors ( Fan, LP and HP) all turning at their own best speeds.

Its a two-spool turbojet with the LP turbine also driving a planetary reduction drive in front of the lp compressor, which then drives a bypass fan.

[AgentJayZ]

@tranceaddict704 The PW1000 is a new engine, but not a new design. The Garrett ( Allied Signal -> now Honeywell aerospace) TFE731 was a geared turbofan introduced in 1972. It's still flying today in thousands of aircraft.

[tranceaddict704]

@AgentJayZ. Hey Jay, I was reading about the PW1000G and I was wondering if you could explain how it's supposed to be so much more fuel efficient

[MrWarwick15]

Thanks Jay!

[zero00tolerance]

Thanks for sharing ! what a mind boggling job u got there...how many years does it takes you to learn all that ?

[marcosaba360]

Cheers from Brasil !!

[NoWattz]

Seem like a rather complex means in which to pump fuel. Are there any particular advantages to using that style fuel pump versus others? Also, any idea how many RPM's that pump sees?

[AgentJayZ]

@NoWattz without counting gear teeth, it appears to rotate at main rotor rpm, so 7800 or so at full power setting.

[oisiaa]

So how much would you say this pump is worth?

[AgentJayZ]

@oisiaa It has no value unless you need one for your Orenda turbojet in your Sabre 6, and then it becomes one of those parts you can't fly without. Almost irreplaceable.

[oisiaa]

You don't sound funny at all. You could blend right in in the US (well, maybe not South Carolina, those guys do have pretty harsh accents).

[Fierobsessed]

I am a hydraulic tech. Two things that I have never seen in industrial hydraulic pumps: Return springs, and the non parallel pistons. The only function I can see for the non parallel pistons, is to use centrifugal force to also help the pistons return to the swash plate. That's a lot of insurance to keep the pistons in place. Other then that, it is just another standard industrial hydraulic pump. Normally only that ring with the holes is used to keep the pistons against the swash plate. Thanks!

[MrHaun]

West coast is the best coast! (born alaska, raised minnesota). The specialized puller tool FTW. Improvisation just like we do as well in the automotive field. haha.

[circe362]

I like simple puller at 9:15

[circe362]

I am from Canada and now live in ohio! I lost the "A" and the accent. (Except for the word aboot)

-"about"

[circe362]

you sound funny

:)

[matube73]

Way to go Jay. I was most impressed and suprised to see a pump get that sophisticated. But this is aero stuff so nothing should suprise me. Those designers and engineers can be so smart. Keep them great vids coming. Take it easy and cheers.

[mobius1aic]

Great video as always. Did a bit of reading to figure out how an axial piston pump works. It boggles my mind how many types and variations of pumps there are.

[JetMech72]

Do you guys do any NDI to see if those parts of "unknown origin" could be serviceable?

[AgentJayZ]

@JetMech72 We do some non-destructive testing, but in this case I just pulled an extra drive case from our "long term storage" to get a gear out of it to turn the fuel pump by hand during reassembly.

[Blackmoonempire]

Great Video! Aninteresting technique to pump fuel, i always wondered how such large amounts of fuel with the necessary pressure get through the fuel nozzles.

Very interesting parts inside there, and as a CNC programmer i have massive respect how this parts were manufactured. Today, there would be no problem for a 5-axis CNC-mill to produce this parts, but for being made in the 40's and 50's, this is a masterpiece of engineering and manufacturing!

Thanks for another great detail in jet tech!

[CX118]

I love the videos Jay. I almost had a job like yours in the Air Force, but they chose me to do other things, like go to Germany and work in a airport terminal.

[cganz1234]

Really good stuf JayZ!!

Love watching your vids and its great to see various parts taken apart. In the field I dont get the chance to see this stuff due to the fact that our 2 Speys are so reliable we rarely touch them except at midlife or overhaul and they always go to the pros (like you guys).

Keep up the great work!!!

P.S. You are correct, in the States we are reffered to as Aircraft Maintenance Techs, which is a change from the older A&P (Airframe and Powerplant certifications).

[AgentJayZ]

@cganz1234 When your Speys need work, or if you need parts, call us.

There's a Spey in our test cell right now.

[AgentJayZ]

@AgentJayZ I'm working on editing the video of the testing right now.

[LarryCanFly]

Awesome pump.

[crazyrum]

wow, finally a live example of displacement pump. Thanks!

[TehVag]

im 24 years old ... and im thinking i've chosen the wrong job to do.

I only wish if i was a mechanic of that kind of staff...

Im subscribed for many months here... i always freeze up whatever i have to do when i notice there's a new video of your's to watch!

Great job, great footage... much respect!

[JayJr2007]

Great stuff as always!

[mrakmrakmrakmrak]

Nice, thx! :)