23 Jun 2025, 16:53 [ UTC - 5; DST ]
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Username Protected
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Post subject: Re: Such a bummer  Posted: 22 Oct 2020, 08:31 |
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Joined: 05/05/09
Posts: 5198
Post Likes: +5218
Aircraft: C501, R66, A36
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Username Protected wrote: I was having a blast with the new Jetprop until today. On a hunch, I had a borescope done on the engine to ensure all was well. Unfortunately the news was bad. FOD after only 45 hours! I'm hoping the damage can be blended and should know more tomorrow.
The only downside of the turbines as far as I can tell. If that was a Citation fan or impeller, it would be nothing to blend that. I wouldn't sweat it too much.
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Username Protected
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Post subject: Re: Such a bummer Posted: 22 Oct 2020, 08:43 |
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Joined: 11/25/16
Posts: 1930
Post Likes: +1576
Location: KSBD
Aircraft: C501
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Username Protected wrote: I'm hoping the damage can be blended and should know more tomorrow. If that was a Citation fan or impeller, it would be nothing to blend that. I wouldn't sweat it too much.
Blending is just smoothing the edges or does blending also mean adding material?
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Username Protected
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Post subject: Re: Such a bummer Posted: 24 Oct 2020, 14:11 |
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Joined: 04/26/13
Posts: 21707
Post Likes: +22264
Location: Columbus , IN (KBAK)
Aircraft: 1968 Baron D55
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Username Protected wrote: If that was a Citation fan or impeller, it would be nothing to blend that. I wouldn't sweat it too much. Blending is just smoothing the edges or does blending also mean adding material?
You can’t add material, it’s just smoothing like a propeller to remove edges that can concentrate forces and start cracks.
_________________
My last name rhymes with 'geese'.
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Username Protected
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Post subject: Re: Such a bummer Posted: 24 Oct 2020, 15:43 |
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Joined: 08/24/13
Posts: 9790
Post Likes: +4574
Company: Aviation Tools / CCX
Location: KSMQ New Jersey
Aircraft: TBM700C2
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Username Protected wrote: So would you remove some material from the blade 180 degrees away for balance? From the PT6A maint manual: Blending to maximum permissible depth may result in compressor unbalance. If the amount of material removed exceeds 50% of the recommended limit, the diametrically opposite blade should be blended to the same dimension
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Username Protected
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Post subject: Re: Such a bummer Posted: 25 Oct 2020, 20:52 |
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Joined: 06/17/14
Posts: 5908
Post Likes: +2657
Location: KJYO
Aircraft: C-182, GA-7
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Username Protected wrote: Damn, I'm smart.  I would have died laughing if Mike C made that comment BUT he isn’t that direct even if it is that true.
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