merlin
Junior Member
Joined: November 2020
Posts: 54
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Post by merlin on Jul 6, 2022 12:22:05 GMT -5
So i came across a website selling decommissioned RB199 turbine, they seem in good condition and i was thinking about getting one. How much do you think the price should be? Keep in mind that they come without their FADEC and it would take allot of work and retro engineering to get it to work again
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jetric
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Joined: December 2014
Posts: 149 
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Post by jetric on Jul 7, 2022 0:36:40 GMT -5
This is really not a good engine to get running as the fuel system is totally controlled by the fadec and if you feed the fuel pump with the wrong signal the default throttle setting is 130% rpm this is to ensure the aircraft is destroyed once the ejector seats are deployed!!! Also you will have to buy a bmw/RR T312 apu and supplementary power system gearbox for the apu to bolt to, these APU's are not cheap now as there's not many left now. Richard S. So i came across a website selling decommissioned RB199 turbine, they seem in good condition and i was thinking about getting one. How much do you think the price should be? Keep in mind that they come without their FADEC and it would take allot of work and retro engineering to get it to work again
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Post by wannabebuilderuk on Jul 7, 2022 3:45:07 GMT -5
This is really not a good engine to get running as the fuel system is totally controlled by the fadec and if you feed the fuel pump with the wrong signal the default throttle setting is 130% rpm this is to ensure the aircraft is destroyed once the ejector seats are deployed!!! Also you will have to buy a bmw/RR T312 apu and supplementary power system gearbox for the apu to bolt to, these APU's are not cheap now as there's not many left now. Richard S. So i came across a website selling decommissioned RB199 turbine, they seem in good condition and i was thinking about getting one. How much do you think the price should be? Keep in mind that they come without their FADEC and it would take allot of work and retro engineering to get it to work again
That's an interesting fact about the 130% throttle, do you have any more info as googling comes up with nothing? Ben |
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jetric
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Joined: December 2014
Posts: 149
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Post by jetric on Jul 7, 2022 4:27:02 GMT -5
It was a technician that works on the engines in the RAF that told my friend/business partner about it as he had just bought a load of surplus RB199s and we were thinking of getting them running. The throttle system is rigged so that once the ejector seats are operated the aircraft is then in self distruct mode as you don't want the technology to fall into the enemy's possession. With this info we decided to not try and run them, it could be false info but it did come from a legit source. This is really not a good engine to get running as the fuel system is totally controlled by the fadec and if you feed the fuel pump with the wrong signal the default throttle setting is 130% rpm this is to ensure the aircraft is destroyed once the ejector seats are deployed!!! Also you will have to buy a bmw/RR T312 apu and supplementary power system gearbox for the apu to bolt to, these APU's are not cheap now as there's not many left now. Richard S. That's an interesting fact about the 130% throttle, do you have any more info as googling comes up with nothing? Ben
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merlin
Junior Member
Joined: November 2020
Posts: 54
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Post by merlin on Jul 8, 2022 20:56:27 GMT -5
It was a technician that works on the engines in the RAF that told my friend/business partner about it as he had just bought a load of surplus RB199s and we were thinking of getting them running. The throttle system is rigged so that once the ejector seats are operated the aircraft is then in self distruct mode as you don't want the technology to fall into the enemy's possession. With this info we decided to not try and run them, it could be false info but it did come from a legit source. That's an interesting fact about the 130% throttle, do you have any more info as googling comes up with nothing? Ben
Can't the throttle system be bypassed?, can't i feed it directly to the fuel nozzle?
As for the APU its only purpose is to get the engine to spin at the correct speed to start, there is so many ways to skin a cat.
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jetric
Veteran Member
Joined: December 2014
Posts: 149
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Post by jetric on Jul 9, 2022 2:07:20 GMT -5
You will be needing 150hp to spin it up!!! As for feeding directly to the fuel nozzles you will be needing a fuel pump capable of a minimum of 200psi at quite a high fuel flow, the reheat/afterburner fuel pressure and flow will be significantly higher than this with the added complexity of scheduling the thrust nozzle area as well. If you just want to run the engine at idle using your own fuel pump then go for it if you can get the engine cheap enough, bear in mind that this engine uses a vaporiser fuel system in the combustion chamber so you will need to schedule in the pre-heat burners on start up. Richard S. It was a technician that works on the engines in the RAF that told my friend/business partner about it as he had just bought a load of surplus RB199s and we were thinking of getting them running. The throttle system is rigged so that once the ejector seats are operated the aircraft is then in self distruct mode as you don't want the technology to fall into the enemy's possession. With this info we decided to not try and run them, it could be false info but it did come from a legit source.
Can't the throttle system be bypassed?, can't i feed it directly to the fuel nozzle?
As for the APU its only purpose is to get the engine to spin at the correct speed to start, there is so many ways to skin a cat.
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Post by stoffe64 on Jul 11, 2022 5:12:26 GMT -5
Richard,how much is it for a T312 APU these days?,still tinkering with my T312 to connect it to the gearbox that i have, build some form of frame with wheels,connect up a small electrical schematics To get it to start...there were problem with that APU also,still worried about it..it scrapes sound when you turn it around (yikes!!!)I Guess it is because the APU has been laying in the crate since i bought it in autumn 2019 i hope it remedies itself when oil is filled up and APU is installed on the gearbox,that APU had Only 30 hours on the counter,i hope for the best,any ideas Richard staveley on my APU??
Any help appreciated my friend!!
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Post by stoffe64 on Jul 11, 2022 5:59:12 GMT -5
Richard,how much is it for a T312 APU these days?,still tinkering with my T312 to connect it to the gearbox that i have, build some form of frame with wheels,connect up a small electrical schematics To get it to start...there were problem with that APU also,still worried about it..it scrapes sound when you turn it around (yikes!!!)I Guess it is because the APU has been laying in the crate since i bought it in autumn 2019 i hope it remedies itself when oil is filled up and APU is installed on the gearbox,that APU had Only 30 hours on the counter,i hope for the best,any ideas Richard staveley on my APU?? Any help appreciated my friend!! |
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merlin
Junior Member
Joined: November 2020
Posts: 54
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Post by merlin on Jul 11, 2022 18:59:59 GMT -5
You will be needing 150hp to spin it up!!! As for feeding directly to the fuel nozzles you will be needing a fuel pump capable of a minimum of 200psi at quite a high fuel flow, the reheat/afterburner fuel pressure and flow will be significantly higher than this with the added complexity of scheduling the thrust nozzle area as well. If you just want to run the engine at idle using your own fuel pump then go for it if you can get the engine cheap enough, bear in mind that this engine uses a vaporiser fuel system in the combustion chamber so you will need to schedule in the pre-heat burners on start up. Richard S.
Can't the throttle system be bypassed?, can't i feed it directly to the fuel nozzle?
As for the APU its only purpose is to get the engine to spin at the correct speed to start, there is so many ways to skin a cat.
How do you know so much about a military engine? Did you work for Turbo Union?! not complaining tho, thats valuable knowledge, thank you.
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jetric
Veteran Member
Joined: December 2014
Posts: 149
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Post by jetric on Jul 11, 2022 19:08:29 GMT -5
I work at Rolls-Royce! Richard S. You will be needing 150hp to spin it up!!! As for feeding directly to the fuel nozzles you will be needing a fuel pump capable of a minimum of 200psi at quite a high fuel flow, the reheat/afterburner fuel pressure and flow will be significantly higher than this with the added complexity of scheduling the thrust nozzle area as well. If you just want to run the engine at idle using your own fuel pump then go for it if you can get the engine cheap enough, bear in mind that this engine uses a vaporiser fuel system in the combustion chamber so you will need to schedule in the pre-heat burners on start up. Richard S.
How do you know so much about a military engine? Did you work for Turbo Union?! not complaining tho, thats valuable knowledge, thank you.
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Post by stoffe64 on Jul 12, 2022 4:09:06 GMT -5
Richard,how much is it for a T312 APU these days?,still tinkering with my T312 to connect it to the gearbox that i have, build some form of frame with wheels,connect up a small electrical schematics To get it to start...there were problem with that APU also,still worried about it..it scrapes sound when you turn it around (yikes!!!)I Guess it is because the APU has been laying in the crate since i bought it in autumn 2019 i hope it remedies itself when oil is filled up and APU is installed on the gearbox,that APU had Only 30 hours on the counter,i hope for the best,any ideas Richard staveley on my APU?? Any help appreciated my friend!! |
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jetric
Veteran Member
Joined: December 2014
Posts: 149
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Post by jetric on Jul 12, 2022 6:23:30 GMT -5
The T312 APU's are selling for around £4000 now if you can find one! Richard S. Richard,how much is it for a T312 APU these days?,still tinkering with my T312 to connect it to the gearbox that i have, build some form of frame with wheels,connect up a small electrical schematics To get it to start...there were problem with that APU also,still worried about it..it scrapes sound when you turn it around (yikes!!!)I Guess it is because the APU has been laying in the crate since i bought it in autumn 2019 i hope it remedies itself when oil is filled up and APU is installed on the gearbox,that APU had Only 30 hours on the counter,i hope for the best,any ideas Richard staveley on my APU?? Any help appreciated my friend!! |
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Post by stoffe64 on Jul 12, 2022 15:01:27 GMT -5
Yes,i payed 4350 gbp for mine,that was in autumn of 2019,the gearbox was much cheaper!
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merlin
Junior Member
Joined: November 2020
Posts: 54
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Post by merlin on Jul 12, 2022 16:28:17 GMT -5
Yes,i payed 4350 gbp for mine,that was in autumn of 2019,the gearbox was much cheaper! Wait, they're sold separately?!
Did you check the combustion chamber, the turbines and nozzle vanes? Is the engine still in working condition?
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merlin
Junior Member
Joined: November 2020
Posts: 54
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Post by merlin on Jul 12, 2022 16:29:42 GMT -5
I work at Rolls-Royce! Richard S.
How do you know so much about a military engine? Did you work for Turbo Union?! not complaining tho, thats valuable knowledge, thank you.
Well i guess that explains
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