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Mammoth Compressor

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Old 10-21-2015, 11:31 AM
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gapellegrini
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Default Mammoth Compressor

Hi Guys,

This is my Mammoth. Do you guys think I should replace the compressor? Or is it okay?

I had a crash with not much impact and need to change some parts on the turbine like cover, starter case. What's your oppinion on compressor?

Thanks in advance
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Old 10-21-2015, 02:27 PM
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Hello Gabriel
It does not look that bad from the picture but it is hard to tell, I don't see a dent that can cause a fracture or vibration but again, hard to tell from the picture
Ask Michel (Brazilian service center) what he thinks
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Old 10-21-2015, 02:46 PM
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gapellegrini
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Juan,

the turbine is with Michel. He told me replace this part is not mandatory but if was his turbine he would change. I will aks for more pictures and post here.

Thanks for your help

Gabriel
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Old 10-22-2015, 08:44 AM
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Here is another picture.
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Old 10-22-2015, 08:48 AM
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Have seen much worse working well for years on other higher-revving engines Gabriel, but as the engine is already with Michel, I think is better to change it.

Um abraço, Enrique
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Old 10-24-2015, 07:03 AM
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Originally Posted by erbroens View Post
Have seen much worse working well for years on other higher-revving engines Gabriel, but as the engine is already with Michel, I think is better to change it.

Um abraço, Enrique
I flew worse for a very long time as well.

Juan any oppinion?
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Old 10-26-2015, 11:11 AM
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Originally Posted by gapellegrini View Post
I flew worse for a very long time as well.

Juan any oppinion?
Hello,

it it does not look that bad but the only thing I would be worried about is how much of those small chips got inside the turbine. How do the bearings sound. The best thing to do is change it and have the bearings checked however it's up to you and if the turbine runs good and you don't hear any noise from the bearings as well as any vibrations only you can decide as we can't tell you to keep running an engine that has some minor chips to the compressor.

If if you have any further questions please feel free to give me a call.
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Old 10-26-2015, 01:39 PM
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Originally Posted by rcjets12 View Post
Hello,

it it does not look that bad but the only thing I would be worried about is how much of those small chips got inside the turbine. How do the bearings sound. The best thing to do is change it and have the bearings checked however it's up to you and if the turbine runs good and you don't hear any noise from the bearings as well as any vibrations only you can decide as we can't tell you to keep running an engine that has some minor chips to the compressor.

If if you have any further questions please feel free to give me a call.
Jose,

The turbine is with Jet Central Brazil. Its open and the bearings will be changed. I know the best is to change the compressor but this is a project that crashed on maiden. I got a new plane and I'm trying to save as much as I can on this overbudget project.

So Jet Central Brazil gave me the option to not replace compressor if it can be balanced. They told me could be some risks but can be done. I posted here to get some opinions on the risk so I can make a decision. So do you think Im good to use this part replacing bearing and balancing compressor?

Thanks for your help
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Old 10-28-2015, 10:52 AM
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Originally Posted by gapellegrini View Post
Jose,

The turbine is with Jet Central Brazil. Its open and the bearings will be changed. I know the best is to change the compressor but this is a project that crashed on maiden. I got a new plane and I'm trying to save as much as I can on this overbudget project.

So Jet Central Brazil gave me the option to not replace compressor if it can be balanced. They told me could be some risks but can be done. I posted here to get some opinions on the risk so I can make a decision. So do you think Im good to use this part replacing bearing and balancing compressor?

Thanks for your help
as always with something like this there is a risk. However if they do balance and really check that compressor really you should be ok. The biggest thing is making sure nothing went inside the turbine and making sure no vibration was there. what I recommend is anytime you start the turbine is that you check for vibration and quickly run up to full throttle at least for the first few times after you get it back. I'm very old school so I always check to make sure I'm getting full throttle before takeoff anyways.
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