@mpwelk The engine is loaded by the fabricated tailcone we attach. The outlet is smaller than what is used in operation, and provides a calibrated restriction to exhaust flow. We measure the pressure rise within that tailcone, and calculate the power of the engine using that data.
Hi AgentJZ....2 questions....why so much rattle on the back end while spooking down...not enough centrifugal force to keep the blades tight in their slots?and why so many nuts whithout lock wiring?
How does this gas turbine deliver lubrication to its main rotor bearings? Isn't there a term for a non-recovery oil system? I cannot recall what that term is.
@rickey5353 Like all other jet engines, but some of the oil sumps require a small negative pressure. The engine needs more support from the off-engine equipment than other industrial engines.
The term is "total loss', I think, and it was popular many years ago with small engines.
Sorry my English, I use a translator. I did not think the YouTube I can find videos about our GG. They are my work. We use these motors for gas compression station in Siberia. The complex "Coberra" engine Avon1535 (mod5020). Very good and reliable equipment. And it's very interesting to see him here )))). Thank you.
@AgentJayZ. I checked out the video, so Solar engines are dedicated ground based engines? They aren't used in any aircraft I know of, and you said they have a built in PT and shaft output.
@tranceaddict704 Solar are true industrial and marine turbine engines, meaning they were not originally designed to power aircraft and then modified to perform in industrial applications.
Having never been designed to fly, they are much heavier than the aeroderivative industrial engines we see more often in our shop. Some Solars are used to power ships, but they are all heavily built and very reliable engines.
@AgentJayZ. My father works for Williams Transco, which is a natural gas supplier and they have a "solar mars" 15,000hp turbine that they use to run a centrifugal compressor along with several reciprocating engines driving positive displacement compressors. My question is, have you heard of these turbines? He said they have other models too but I didn't get any specifics other than the one he helped install.
@tranceaddict704 Yes, we work on Solar engines. Have you seen my test video of the Saturn?
The solars have an integral power tubine and a shaft power output. The Speys, Avons, LM1500s and Olympus(es) need to be connected to a separate power turbine, but all these engines, when used in the gas industry, power centrifugal compressors connected to pipelines.
Great Video as ever! The Adjustment, filmed with the hat-camera felt quite extreme to me, i just thought about 'not to think about, whats going on some inches away inside the engine'.
What kind of camera is the "hat cam"? I seen some footage in the 'racing for the title' video.
P.S.: The VDI is doing a great job in my new car, and looks really great!
@chevylization This test consisted of mostly running at about 60% power, with a short visit to about 75%.
We used several thousand litres of liquid propane fuel. At full power this engine will use about 20 gallons per minute of fuel. When used to power a natural gas compressor staion, it would take its fuel directly from the pipeline, and consumption rate is not measured. I'm not sure how many standard cubic feet of natural gas would equal a gallon of liquid fuel.
That looked intense. I kept thinking about how close you had your head and body to a high RPM rotating mass that large. Then at the end of the video I lol'd when I realized that I was dressed almost exactly as you were. The difference being the only things on my hoodie are welding burn holes.
The first few times you do this adjustment, all you can think about is what might happen if things go wrong... and that has never happened thanks to the work and skill of everyone involved.
After doing this a couple of times, though, it just becomes something that makes you enjoy the experience.
Life is all about doing stuff, and stuff is cool, no ?
@TheDeeSpence The airflow control unit is adjusted so the bleed valves open at the correct rpm on acceleration of the engine. There is a nomogram we use to calculate the offset of the actuation rpm based on ambient temperature.
No, I am not permitted to explain any further. Thank you for your interest. Your questions are not being monitored.
Very pretty engine..... would love to see an old bus powered by a gas turbine. Pointless, but fun.
Out of curiosity what impact, if any, do extremes of ambient temperature have on turbine engines? I'm guessing that in very cold climates, ice is the major problem
So where is this engine going? It looks to be configured partially for aircraft operation (judging from the nozzle), but seeing all the lines and what not, it looks like it's being converted to an industrial use engine.
Also, interesting how you guys use a big cargo container for your monitoring room hehe. Pretty cool since it's already a nicely sized preformed structure.
@Helicopterpilot16 To clarify, it was the English operated F-4K and M variants that had the Spey. It's easy to tell the difference considering the rectangular RWR system on top of the tail, more bulbous engine fairings and larger nose radome.
Why does the starter turbine stop completely after its job is done, but when the engine is slowing down, it starts moving again? Does the clutch have more friction at low speed?
@sharrynuk I knew someone would ask that... OK: the starter drive - what the starter is connected to - has a centrifugally activated mechanism that decouples from the starter above 3000 rpm, but below that is a one way ratcheting clutch. as the engine climbs above that speed, the starter, which is cut off from its compressed air power supply above 2500 engine rpm, comes to a complete stop.
As the engine drops below 3000 rpm on shutdown, the one way ratchet mechanism becomes engaged.
@AgentJayZ The ratchet mechanism is designed for the engine to be driven by the starter, but there is a small amount of drag which will allow the engine to drive the starter with a small amount of torque below 3000 rpm.
The Spey 500 series aircraft engines were used as a starting point for the Allison Engine corporation of USA to make a licensed copy for use in American military aircraft in the VietNam era. That engine was called the TF-41.
The TF-41 design was then modified to produce what was called the Marine and Industrial Spey Mk1900, which is what you see here.
The fan of the TF-41 has been cut down on the MK1900 to eliminate the bypass airflow.
@AgentJayZ So the aircraft Speys and TF-41 engines are turbofans, but the industrial Spey would be a turbojet, except is has no jet nozzle to accelerate the exhaust gases to produce thrust, so technically it is a gas generator.
I forgot to mention that the 500 series Spey were indeed the engines on the BAC 111.
@AgentJayZ Thankyou Jay, very imformative as always. keep up the good work and maybe you could do a video on the lubrication side of things at some point?
@mytmousemalibu It's oil mist. The Spey has an unusual type of oil seal around the bearing cavities, and it really works best at high rpm settings. This was the first time this engine was run after total rebuild, and the vent cleared up after a run to high power settings.
@cheetawolf The compressors would stall as they transition from idle to mid-power. It sounds like an explosion, and flames come out the front of the engine. It's very hard on parts, and usually causes the pilot of an aircraft to return declare an emegency and land.
Interesting to look at the related videos to the right: some are other videos of mine about the Spey and other RR engines.
Some are fishing videos.
Reason:Back in the day, RR named it jet engines after rivers all around the UK, and the Spey was named after the Spey, which is a popular fishing river.
Ahhh, a great sound. My Dad used to take me to the airport when I was a small child. The BAC-111 that used to pop in always scared me as it was quite a noisy bugger.
Damned noise regulations killed off all those classic aeroplanes! :(
Is there a test load or something like that?
mpwelk 1 week ago
@mpwelk The engine is loaded by the fabricated tailcone we attach. The outlet is smaller than what is used in operation, and provides a calibrated restriction to exhaust flow. We measure the pressure rise within that tailcone, and calculate the power of the engine using that data.
AgentJayZ 3 days ago
Hi AgentJZ....2 questions....why so much rattle on the back end while spooking down...not enough centrifugal force to keep the blades tight in their slots?and why so many nuts whithout lock wiring?
heligeorge 2 months ago
How does this gas turbine deliver lubrication to its main rotor bearings? Isn't there a term for a non-recovery oil system? I cannot recall what that term is.
rickey5353 2 months ago
@rickey5353 Like all other jet engines, but some of the oil sumps require a small negative pressure. The engine needs more support from the off-engine equipment than other industrial engines.
The term is "total loss', I think, and it was popular many years ago with small engines.
AgentJayZ 2 months ago
Sorry my English, I use a translator. I did not think the YouTube I can find videos about our GG. They are my work. We use these motors for gas compression station in Siberia. The complex "Coberra" engine Avon1535 (mod5020). Very good and reliable equipment. And it's very interesting to see him here )))). Thank you.
MrChibass1 3 months ago
@AgentJayZ. I checked out the video, so Solar engines are dedicated ground based engines? They aren't used in any aircraft I know of, and you said they have a built in PT and shaft output.
tranceaddict704 3 months ago
@tranceaddict704 Solar are true industrial and marine turbine engines, meaning they were not originally designed to power aircraft and then modified to perform in industrial applications.
Having never been designed to fly, they are much heavier than the aeroderivative industrial engines we see more often in our shop. Some Solars are used to power ships, but they are all heavily built and very reliable engines.
AgentJayZ 3 months ago
@AgentJayZ. My father works for Williams Transco, which is a natural gas supplier and they have a "solar mars" 15,000hp turbine that they use to run a centrifugal compressor along with several reciprocating engines driving positive displacement compressors. My question is, have you heard of these turbines? He said they have other models too but I didn't get any specifics other than the one he helped install.
tranceaddict704 3 months ago
@tranceaddict704 Yes, we work on Solar engines. Have you seen my test video of the Saturn?
The solars have an integral power tubine and a shaft power output. The Speys, Avons, LM1500s and Olympus(es) need to be connected to a separate power turbine, but all these engines, when used in the gas industry, power centrifugal compressors connected to pipelines.
AgentJayZ 3 months ago
Great Video as ever! The Adjustment, filmed with the hat-camera felt quite extreme to me, i just thought about 'not to think about, whats going on some inches away inside the engine'.
What kind of camera is the "hat cam"? I seen some footage in the 'racing for the title' video.
P.S.: The VDI is doing a great job in my new car, and looks really great!
Blackmoonempire 3 months ago
Even after watching 100 times it still impressive. How much fuel does it takes and how expensive is to run a test like this?
chevylization 3 months ago
@chevylization This test consisted of mostly running at about 60% power, with a short visit to about 75%.
We used several thousand litres of liquid propane fuel. At full power this engine will use about 20 gallons per minute of fuel. When used to power a natural gas compressor staion, it would take its fuel directly from the pipeline, and consumption rate is not measured. I'm not sure how many standard cubic feet of natural gas would equal a gallon of liquid fuel.
AgentJayZ 3 months ago
Love the spey sound
DARKJURNEY 3 months ago
That looked intense. I kept thinking about how close you had your head and body to a high RPM rotating mass that large. Then at the end of the video I lol'd when I realized that I was dressed almost exactly as you were. The difference being the only things on my hoodie are welding burn holes.
devildad1620 3 months ago
@devildad1620
The first few times you do this adjustment, all you can think about is what might happen if things go wrong... and that has never happened thanks to the work and skill of everyone involved.
After doing this a couple of times, though, it just becomes something that makes you enjoy the experience.
Life is all about doing stuff, and stuff is cool, no ?
AgentJayZ 3 months ago
Is there a specific temperature adjustments get made at?
TheDeeSpence 3 months ago
@TheDeeSpence The airflow control unit is adjusted so the bleed valves open at the correct rpm on acceleration of the engine. There is a nomogram we use to calculate the offset of the actuation rpm based on ambient temperature.
No, I am not permitted to explain any further. Thank you for your interest. Your questions are not being monitored.
Pay no attention to the white van. :)
AgentJayZ 3 months ago
Hat cam is back.
matube73 3 months ago
Wow! Love your videos! And I even learn something too... :-)
steinrik 3 months ago
I'm not sure if the jay-cam is new or not, but I like it!
Keep up the good work. =]
MrBranboom 3 months ago
Very pretty engine..... would love to see an old bus powered by a gas turbine. Pointless, but fun.
Out of curiosity what impact, if any, do extremes of ambient temperature have on turbine engines? I'm guessing that in very cold climates, ice is the major problem
daniel2001 3 months ago
@daniel2001 Colder air is denser, so making power takes less compresor rpm than in warm temperatures.
Icing is a problem in humid air at or just above freezing temps. In really cold air, icing is not a concern, because it is so dry.
AgentJayZ 3 months ago
@AgentJayZ Cool!
Thanks for replying, much appreciated.
daniel2001 3 months ago
I love the headcam! Please show us how it's mounted. TIA
ConradPino 3 months ago in playlist More videos from AgentJayZ
So where is this engine going? It looks to be configured partially for aircraft operation (judging from the nozzle), but seeing all the lines and what not, it looks like it's being converted to an industrial use engine.
Also, interesting how you guys use a big cargo container for your monitoring room hehe. Pretty cool since it's already a nicely sized preformed structure.
mobius1aic 3 months ago
@AgentJayZ. Weren't Speys used on the Gulfstream 3 and Fokker 100?
tranceaddict704 3 months ago
@tranceaddict704 Fokker F28 Fellowship, Gulf GII GIII, BAC 1-11, and the Nimrod, F-4. But that's just some. The Fokker 100 is RR Tay.
Helicopterpilot16 3 months ago
@Helicopterpilot16 To clarify, it was the English operated F-4K and M variants that had the Spey. It's easy to tell the difference considering the rectangular RWR system on top of the tail, more bulbous engine fairings and larger nose radome.
mobius1aic 3 months ago
Why does the starter turbine stop completely after its job is done, but when the engine is slowing down, it starts moving again? Does the clutch have more friction at low speed?
sharrynuk 3 months ago
@sharrynuk I knew someone would ask that... OK: the starter drive - what the starter is connected to - has a centrifugally activated mechanism that decouples from the starter above 3000 rpm, but below that is a one way ratcheting clutch. as the engine climbs above that speed, the starter, which is cut off from its compressed air power supply above 2500 engine rpm, comes to a complete stop.
As the engine drops below 3000 rpm on shutdown, the one way ratchet mechanism becomes engaged.
AgentJayZ 3 months ago
@AgentJayZ The ratchet mechanism is designed for the engine to be driven by the starter, but there is a small amount of drag which will allow the engine to drive the starter with a small amount of torque below 3000 rpm.
AgentJayZ 3 months ago
Would the bleed valves be plumbed into the exhaust stream on final configuration?
rlvilleman 3 months ago
@rlvilleman no...
AgentJayZ 3 months ago
Hi Jay fantastic video as always. Is this the same engine that was fitted to the BAC 1-11? Thankyou
xxJohn1977xx 3 months ago
@xxJohn1977xx Very similar. Here's the story:
The Spey 500 series aircraft engines were used as a starting point for the Allison Engine corporation of USA to make a licensed copy for use in American military aircraft in the VietNam era. That engine was called the TF-41.
The TF-41 design was then modified to produce what was called the Marine and Industrial Spey Mk1900, which is what you see here.
The fan of the TF-41 has been cut down on the MK1900 to eliminate the bypass airflow.
AgentJayZ 3 months ago
@AgentJayZ So the aircraft Speys and TF-41 engines are turbofans, but the industrial Spey would be a turbojet, except is has no jet nozzle to accelerate the exhaust gases to produce thrust, so technically it is a gas generator.
I forgot to mention that the 500 series Spey were indeed the engines on the BAC 111.
AgentJayZ 3 months ago
@AgentJayZ Thankyou Jay, very imformative as always. keep up the good work and maybe you could do a video on the lubrication side of things at some point?
xxJohn1977xx 3 months ago
Jay, what is the smoke/mist from that bleed pipe? Moisture?
mytmousemalibu 3 months ago
@mytmousemalibu It's oil mist. The Spey has an unusual type of oil seal around the bearing cavities, and it really works best at high rpm settings. This was the first time this engine was run after total rebuild, and the vent cleared up after a run to high power settings.
AgentJayZ 3 months ago
what's the point of the bleed valves? what would happen if they didn't exist or were pulgged?
cheetawolf 3 months ago
@cheetawolf The compressors would stall as they transition from idle to mid-power. It sounds like an explosion, and flames come out the front of the engine. It's very hard on parts, and usually causes the pilot of an aircraft to return declare an emegency and land.
AgentJayZ 3 months ago
Why this engine doesn't have a cone after LP turbine?
Reisi81 3 months ago
Interesting to look at the related videos to the right: some are other videos of mine about the Spey and other RR engines.
Some are fishing videos.
Reason:Back in the day, RR named it jet engines after rivers all around the UK, and the Spey was named after the Spey, which is a popular fishing river.
AgentJayZ 3 months ago
@AgentJayZ Well done youtube. Nice video btw.
nodariel 3 months ago
What is the tube passing horizontally from compressor to turbine (or from turbine co compressor =) (seen at ~9.20) ?
degl1234 3 months ago
@degl1234 Its an air transfer tube carrying air bled off the HP compressor and used to cool the turbine stators (nozzles).
AgentJayZ 3 months ago
Ahhh, a great sound. My Dad used to take me to the airport when I was a small child. The BAC-111 that used to pop in always scared me as it was quite a noisy bugger.
Damned noise regulations killed off all those classic aeroplanes! :(
FrontSideBus 3 months ago