I’m in school right now for aviation ! Learning how to work on these and take them apart and this was absolutely the biggest help to me ! Thank you so much
Thanks for posting. I remember those training aids from my time at Rucker in 03. Out now but moonlighting a few times a year in the B206. Good refresher!
+Afrocanuk There is also an amazing amount of reduction that takes place in the main rotor gear box. Most man rotor spin in a range of 230-600 rpm depending on the type of helicopter. Thanks for the comment please share & subscribe.
Thank you so much, that make me know this engine is different from common Gas Turbine or general types. They designed the combustion chamber is installed in the back of the engine.
Beautiful cutaway, excellent tutorial covering the basics. I'd be very interested in you doing another video, using the same diagram, showing the starting sequence, the compressor stage, external compressor, etc and what chain of events occur in sequence. Great video sir, thank you!
Would love to see it when you get it built. I love the Allison turboprop engine for airplanes.. amazing engines.. Small size, huge power. Do you know what speed the final RPM of the Bell 206 is approximately? I know it varies, but stable lift, regular cruise rpm of the rotors? I know that an airplane prop, has about a 10:1 15:1 gearbox reduction on some aircraft, making final rpm approx 2200-2500 rpm.. However, helicopters have 2 transmissions I believe.. Reduction down to a base RPM of 2500ish, then down to 300-400 rpm final. I think this can vary quite a bit, but the engines have a basic cruise speed where they're most efficient. I guess this depends on every helicopter on the diamter of the blade, length of the blade, and most importantly, the magical tip speed of the rotor. I know it's extremely hard on any blade or rotor, not to mention noisy as hell, for the tip of the blade or prop to break the sound barrier, so they stay well below that speed.. But the actual final drive transmissions and gear reduction from 20,000 - 100,000 RPM in turbine engines always amazed me. Turning raw high speed whining turbine into a final drive output speed you can conceive.. I'd love to replace a twin engine Cessna 421b continental piston engines with Allison Turboprops... but the final cost is so staggering to do so, it's just not worth it. Would be an amazing conversion however.
That model is cool - now I can go show my mate who doesn't think a helicopter can land if the engine fails. I can prove to him that the power turbine is physically not connected to the gas generator :)
I've seen this video before, but this semester I took a class about GTE thermodynamic cycles / component design and now it all makes sense. Great video man. Thank you for your service to this country.
Yeah it's really amazing. To think the SR 71 flew just a few years after the conception of jet engines.. Today's technology must be out of this world.. Hope we keep being the good guy.
So lobbyists existed back in the 1930's then?? Multi billion dollar turbo reciprocating engine contracts and maybe the fear of the technology being handed over.. I always thought Hitler had developed the first turbo jet.
He should be giving credit to the manufacture Alison that made this engine. It is a very very old, but still used engine on helicopters. The Alison C-250 and other versions are still great engine.
Alison is just the gear box , Alison is the inventor of the gear box that's used on Turbins , also the same company that makes the Abrams 1 tank transmission and the Alison Transmission on Duramax trucks and Alison transmissions on commercial Diesel Semi trucks . GENERAL MOTORS actually built these turbin engines . General motors got out of the business of building turbine engines and sold the right to the engine to Roles Royce . All the Data tags are on the right side of the engine . The hot section ( turbine ) the Alison gear box , and the compressor section .
i just subscribed to your channel. and thank you for schooling me on turbine engines. i really learned alot. and there is alot more i need to learn. so i will be looking forward to your videos. thanks!
Do piston powered helicopters still exist? I read that during the Vietnam war, the H34 was used by the Marines and it had a similar payload and spec to the Huey however it was ultimately phased out. In light civil aviation piston engines are still common but not so helicopters?
good vid. I wish you'd explain the accessories and fuel/oil routing as well. that would be a very complete explanation. also you should mention that its an allison? rolls-royce 250
Yes and No depending on the year and model of OH-58 I suggest you do a google search on the differences and wikipedia has a good wright up on it as well. Thanks for the question, Please Share & Subscribe.
Best animation I've ever seen on a helo jet engine, showing all functions. If the see thru ports were made of pyrex glass, could you actually run this engine? Thanks!
I have got an assignment on the structural design of centrigugal compressors. really hard finding any help with that, anyone here wanna help me out with relevant info??
+Lloyd Morrison It is an electric starter and does draw a lot of amps. Most pilots will use a GPU to supplement the battery to help avoid a hot start, it makes a lot of difference in the start. Thanks for the comment, Please Share & Subscribe.
Why is the turbine shown in the video different than your standard turbine you see in military planes? For example, Compressor, combustor, turbine, exhaust is in a straight line and in the video shown, the compressed air runs to the back of the turbine, and then forward. Why the difference?
Found this on Wki, and it swill does not really explain why. I will try to find out more from the guys at the flight line. Allison adopted a reverse airflow engine configuration for the Model 250: although air enters the intake/compression system in the conventional fashion, the compressed air leaving the centrifugal compressor diffuser is ducted rearwards around the turbine system, before being turned through 180 degrees at entry to the combustor; the combustion products expand through the two stage HP turbine, which is connected, via the HP shaft, to the compression system, before expanding through the two stage power turbine; the exhaust gases then turn through 90 degrees to exit the engine in a radial direction; a stub shaft connects the power turbine to a compact reduction gearbox, located inboard, between the centrifugal compressor and the exhaust/power turbine system.
The layout of a gas turbine is usually dependant upon its application. The straight-through design that you described (comp, diffuser, combustion then turbine) is typical of a turbojet/turbofan design(though there are exceptions to this, especially for turbofans) since their primary propulsive force is derived from thrust from the engine itself. This usually requires as small a frontal area as possible to minimise drag penalties, especially for turbojets and low-bypass turbofans. When you get into turbines such as turboprops and turbo shafts (and some turbofans), the primary method of propulsion is external, i.e, thrust from the propellor or lift from the rotor blades. Hence, there is probably more of a design requirement to keep the power plant as compact as possible while frontal area not being so critical a design factor. As such, various layouts can be achieved, some of which can look the wrong way around, like the P&W Canada PT 6. But this means the free power turbine is at the front of the engine which is very handy for a turboprop application. Hope this hasn't confused you too much.
If you want a REALLY confusing airflow layout for a gas turbine engine, have a look at the Garrett ATF3! Someone was on some good shit when they came up with this design.
information peoples don't know - russian main turboshaft engines using only axial blades. no centrifugal compressor on engine. they using centrifugal blade for tank engine and APU only.
How they build y2k from that engine I just want to see it that rotation from tail you said five thousand rpm, they put that engine motorcycle just the same way
+Bob A Booey All the 206 aircraft that I have flown did not have a functioning A/C and summer in Alabama was hot. Thanks for the comment, Please Share & Subscribe.
The power turbine is driven by the expanding gas from the combustion chamber. the PT through with a gearbox and transmission drives the main and tail rotor. Thanks for the comment, please Share & Subscribe.
I’m in school right now for aviation ! Learning how to work on these and take them apart and this was absolutely the biggest help to me ! Thank you so much
Tell me... have they taught you to mix proseal??
@@uriahday747 yes they have , definitely smells like burnt hair to me
@@uriahday747 There should be a whole course section on this alone. Guys that eyeball that are ridiculous
Brilliant demonstration, a lot better than others I’ve seen. Thank you
Thanks for the explanation! I rode a B-206 today, and I was curious to how the engine worked!
Glad it helped, please share with your friends
Thanks for showing us the intricate design of this engine ❤
Thanks for posting. I remember those training aids from my time at Rucker in 03. Out now but moonlighting a few times a year in the B206. Good refresher!
That was hands down the best explanation of gas turbine engines
One of the more interesting videos on UA-cam... I didn't realize that the reduction gears was such an integral part of the helicopter turbine engine.
+Afrocanuk There is also an amazing amount of reduction that takes place in the main rotor gear box. Most man rotor spin in a range of 230-600 rpm depending on the type of helicopter. Thanks for the comment please share & subscribe.
Thank you so much, that make me know this engine is different from common Gas Turbine or general types. They designed the combustion chamber is installed in the back of the engine.
Awesome vid .. after 40 some odd years of auto mechanics .. I now understand the workings of gas turbine thank you !
Man, that's a whole lot of linkage to make that thing function. Thanks for sharing this!
Check out the newest one on the T-700 series Thanks for the comment, please Share & Subscribe.
Thank you for sharing!
Beautiful cutaway, excellent tutorial covering the basics.
I'd be very interested in you doing another video, using the same diagram, showing the starting sequence, the compressor stage, external compressor, etc and what chain of events occur in sequence. Great video sir, thank you!
I am trying to make one for the GE T-700 series. Thanks for the comment, please Share & Subscribe.
Would love to see it when you get it built. I love the Allison turboprop engine for airplanes.. amazing engines.. Small size, huge power.
Do you know what speed the final RPM of the Bell 206 is approximately? I know it varies, but stable lift, regular cruise rpm of the rotors? I know that an airplane prop, has about a 10:1 15:1 gearbox reduction on some aircraft, making final rpm approx 2200-2500 rpm.. However, helicopters have 2 transmissions I believe.. Reduction down to a base RPM of 2500ish, then down to 300-400 rpm final. I think this can vary quite a bit, but the engines have a basic cruise speed where they're most efficient. I guess this depends on every helicopter on the diamter of the blade, length of the blade, and most importantly, the magical tip speed of the rotor. I know it's extremely hard on any blade or rotor, not to mention noisy as hell, for the tip of the blade or prop to break the sound barrier, so they stay well below that speed.. But the actual final drive transmissions and gear reduction from 20,000 - 100,000 RPM in turbine engines always amazed me. Turning raw high speed whining turbine into a final drive output speed you can conceive..
I'd love to replace a twin engine Cessna 421b continental piston engines with Allison Turboprops... but the final cost is so staggering to do so, it's just not worth it. Would be an amazing conversion however.
Really concise and clear explanation - thanks for posting.
The best sounding start up engines ever. Great video
Thank you for this. Always wondered how the engine transfers energy to the prop.
I work on these and the 500's as part of our company fleet of copters. This was a fantastic info-video. Good Job!
It's easier to understand seeing the real life engine, thanks for the video
Your profile picture makes me feel erect
You go to cook.
@@johncuervo3019 😏
@@domadordemacacos4147 could you do that for me? :3 I like when men cook for me
@@nikoljes8320 No problem, whenever you want and I can also make you happy :)
Thank you
That model is cool - now I can go show my mate who doesn't think a helicopter can land if the engine fails. I can prove to him that the power turbine is physically not connected to the gas generator :)
I've seen this video before, but this semester I took a class about GTE thermodynamic cycles / component design and now it all makes sense. Great video man. Thank you for your service to this country.
Glad it helped out. Thanks for the comment, please Share & Subscribe.
Well done!! Thanks!
TY for your service Sir.
Thanks!
Perfect demonstration, just one question - where impeller comes in picture?
Great explanation! I’m flying an aircraft using the Allison 250-B17
Excellent demonstration Sir!
Great video thank you very much I was wondering how a jet engine transfers power to a drive shaft... Very helpful
vbot111 Glad it helped, please share and subscribe.
Thanks for the upload!
Thank you for serving
That model is exceptional!!! I need one of those for my trade school kids!
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Cool over view of the engine and how it works, thank you.
Awesom, I love how turbine engine works!
Wow this looks very simple. I wonder if newer engines are more complex.
YAY for the Rolls Royce Allison 250. I really think it is really is a good and simple design, if a bit different from some of the competition.
Noah Diamond Thanks for the comment please share and subscribe.
msfirefighter662 where did you get this cutaway model ?
Lot of power out of 136 lbs and thanks for your service brother.
Sure is alot and to think how old the technology is where it is today. Thanks for the comment, Please Share & Subscribe.
Yeah it's really amazing. To think the SR 71 flew just a few years after the conception of jet engines.. Today's technology must be out of this world.. Hope we keep being the good guy.
So lobbyists existed back in the 1930's then?? Multi billion dollar turbo reciprocating engine contracts and maybe the fear of the technology being handed over.. I always thought Hitler had developed the first turbo jet.
Thank for that ...I have a understanding now of the functionality.
+Richard Graham Glad to have helped. Thanks for the comment, Please Share & Subscribe.
Great video mate, short and to the point
TY
A great video, with great explanation, a video made to 100 percent under stand able. Keep it up. Thank u very much
Now i know how abrams engines work
First I thought the demo version was just a scale model but then you showed the real one and it was the same size.
+Maxim Chepelev You are correct it is full size, Thanks for the comment please share & subscribe.
My god its just so...so beautiful.
Life is so shorts to do what you want and make your dreams,
He should be giving credit to the manufacture Alison that made this engine. It is a very very old, but still used engine on helicopters. The Alison C-250 and other versions are still great engine.
+Lorin K Thanks for the comment please share & subscribe.
+Lorin K Is that the same company that makes heavy duty transmissions? Alison IS Very dependable!
Alison is just the gear box , Alison is the inventor of the gear box that's used on Turbins , also the same company that makes the Abrams 1 tank transmission and the Alison Transmission on Duramax trucks and Alison transmissions on commercial Diesel Semi trucks . GENERAL MOTORS actually built these turbin engines . General motors got out of the business of building turbine engines and sold the right to the engine to Roles Royce . All the Data tags are on the right side of the engine . The hot section ( turbine ) the Alison gear box , and the compressor section .
Great video.. million thanks for sharing..
I was thinking of making a flying motorbike using that engine !
Nice! the best explanation.
Thanks a lot for this absolutely amazing video.
I cant believe how tiny the#1 bearing is on these things......used to be an o/h technician
Any idea if a 250 cutaway can be found for purchase?
i just subscribed to your channel. and thank you for schooling me on turbine engines. i really learned alot. and there is alot more i need to learn. so i will be looking forward to your videos. thanks!
Thanks, nice comprehensive explanation.
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Very clear explanation, thanks!
Glad it helped. Thanks for the comment and please share with your friends.
Great explanation!
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Great video. Is it possible that you could post a picture of the engine?
Do piston powered helicopters still exist? I read that during the Vietnam war, the H34 was used by the Marines and it had a similar payload and spec to the Huey however it was ultimately phased out. In light civil aviation piston engines are still common but not so helicopters?
Is this the engine they put on the y2k?
How many fuel injectors are in the combustor?
msfirefighter662
50,000 rpm is 833 rps turbofast can you imagine the engine at full speed rotating 833 rps?
Great video Man and Awesome explanation of the process!! Thanks for the upload and for your Service!!
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very nice
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Have to say it wobe better to have a tripod mounted camera and zoom in ad out giving a more stable video.
Yes I like eninge too
good demo. Work on those camera skills...maybe have friend work the camera while you point/narrate
Pls do one for a Lycoming T-53 L13
Isn't the "Centriphetal" compressor called a "Radial" Compressor?
good vid. I wish you'd explain the accessories and fuel/oil routing as well. that would be a very complete explanation. also you should mention that its an allison? rolls-royce 250
Thanks for the comment, please Share & Subscribe for future videos on turbine engines.
great job man ! Q: is it the same as a OH-58 ? RollsRoyce engine ?
Yes and No depending on the year and model of OH-58 I suggest you do a google search on the differences and wikipedia has a good wright up on it as well. Thanks for the question, Please Share & Subscribe.
Nicely done!
Thanks for the comment, please Share & Subscribe.
Best animation I've ever seen on a helo jet engine, showing all functions. If the see thru ports were made of pyrex glass, could you actually run this engine? Thanks!
Be sure to check out my channel for the GE T-700 engine and the aerial engine Thanks for the comment, please Share & Subscribe.
I have got an assignment on the structural design of centrigugal compressors. really hard finding any help with that, anyone here wanna help me out with relevant info??
explained very well thanks
+NvTwist Thanks for the comment please share & subscribe.
very well done but this engine I assume is down scaled version of the real engine,
Hey it's such a great videos with so clear explanation but yet I'm not shown how is the starter conected to the engine
Thanks for the comment, please Share & Subscribe for future explanations.
amazing that something so compact generates so much power. power output??
It depends on what model but the range is around 370-700 continuous HP. Thanks for the comment, please Share & Subscribe.
Excellent explanation video
Thanks for the comment, please Share & Subscribe. Check out the new one on the GE T-700
How does the starter work? If it is electric, I bet it uses quite a bit of electrical energy to spool the turbine up to speed, to avoid a HOT start.
+Lloyd Morrison It is an electric starter and does draw a lot of amps. Most pilots will use a GPU to supplement the battery to help avoid a hot start, it makes a lot of difference in the start. Thanks for the comment, Please Share & Subscribe.
The turbine outlet temprature needle shooting on battery starts is a sight to see. Very intricate starting for jet ranger
Nice Rolls-Royce engine.
Why is the turbine shown in the video different than your standard turbine you see in military planes? For example, Compressor, combustor, turbine, exhaust is in a straight line and in the video shown, the compressed air runs to the back of the turbine, and then forward. Why the difference?
Found this on Wki, and it swill does not really explain why. I will try to find out more from the guys at the flight line.
Allison adopted a reverse airflow engine configuration for the Model 250: although air enters the intake/compression system in the conventional fashion, the compressed air leaving the centrifugal compressor diffuser is ducted rearwards around the turbine system, before being turned through 180 degrees at entry to the combustor; the combustion products expand through the two stage HP turbine, which is connected, via the HP shaft, to the compression system, before expanding through the two stage power turbine; the exhaust gases then turn through 90 degrees to exit the engine in a radial direction; a stub shaft connects the power turbine to a compact reduction gearbox, located inboard, between the centrifugal compressor and the exhaust/power turbine system.
msfirefighter662 Maybe they used a reverse airflow because it makes the engine size smaller, lighter?
We were told by the instructor that the design was chosen because it was compact, i.e. The design allows the overall length to be shorter.
The layout of a gas turbine is usually dependant upon its application. The straight-through design that you described (comp, diffuser, combustion then turbine) is typical of a turbojet/turbofan design(though there are exceptions to this, especially for turbofans) since their primary propulsive force is derived from thrust from the engine itself. This usually requires as small a frontal area as possible to minimise drag penalties, especially for turbojets and low-bypass turbofans. When you get into turbines such as turboprops and turbo shafts (and some turbofans), the primary method of propulsion is external, i.e, thrust from the propellor or lift from the rotor blades. Hence, there is probably more of a design requirement to keep the power plant as compact as possible while frontal area not being so critical a design factor. As such, various layouts can be achieved, some of which can look the wrong way around, like the P&W Canada PT 6. But this means the free power turbine is at the front of the engine which is very handy for a turboprop application. Hope this hasn't confused you too much.
If you want a REALLY confusing airflow layout for a gas turbine engine, have a look at the Garrett ATF3! Someone was on some good shit when they came up with this design.
information peoples don't know - russian main turboshaft engines using only axial blades. no centrifugal compressor on engine. they using centrifugal blade for tank engine and APU only.
Awesome thank you for that video
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You can explain the operation of the T53L13B engine
If i can find a display I sure can. Thanks for the comment, please Share & Subscribe.
Do you know who the manafacturer of this model is?
How they build y2k from that engine I just want to see it that rotation from tail you said five thousand rpm, they put that engine motorcycle just the same way
Great video.
CheetaInsaaf Thanks for the comment, please share and subscribe.
Thanks great vid 👍
From what I've seen so far, the big concern for me is always going to be Compressor Stall!
What's your MOS? thank you for the vid.
I'm gonna ship out Jan 2nd as a 15B.
Your video is what i really wanted to see
He is a Weiner washer
@@johncuervo3019 That was not very nice! He was simply following instructions. :-) It was a nice video explanation besides.
Love the HEAVY BREATHING..LATER
Im always surprised these gas turbines are so small. You could fit one in a car.
Great Video !!!
Heliflights Aviation School Thanks for the compliment, please share & subscribe.
Greetings friend ! How much it costs to buy an engine like this one or similar?
good to know im currently in turbine transition doing commercial licence in the civilian side.
Hope everything works out for you. Thanks for the comment, please Share & Subscribe.
Great video, very informative.
Troy Harris Glad you enjoyed it, please share & subscribe.
excellent video !
Please check out my other vides on the T-700 series and the Ariel family. Thanks for the comment, please Share & Subscribe.
Enjoyed the video
Victor Hernandez Thanks for the comment, please share & subscribe
Good job, must be nice to have air conditioning, even in a mock up ship. I fly 206's with no air and summer sucks.
+Bob A Booey All the 206 aircraft that I have flown did not have a functioning A/C and summer in Alabama was hot. Thanks for the comment, Please Share & Subscribe.
Trimakasih
You a 15B? That was cool. Thanks for posting.
discofishing I am more of the pilot type thanks for the comment please share and subscribe.
Cool video... Thanks...
+Mac Anix Thanks for the comment please share and subscribe.
Is the power turbine turned by the air or is there a shaft that also moves the power turbine
The power turbine is driven by the expanding gas from the combustion chamber. the PT through with a gearbox and transmission drives the main and tail rotor. Thanks for the comment, please Share & Subscribe.