Today's Message Index:
----------------------
1. 01:27 PM - TBO (N414C)
2. 01:36 PM - Re: TBO (Bill Bow)
3. 01:45 PM - Re: TBO (Chris Schuermann)
4. 02:04 PM - TBO & metal treatments (Todd Hindmarsh)
5. 04:11 PM - Re: TBO & metal treatments (Howard Windham)
6. 05:21 PM - Re: TBO (Chris Schuermann)
7. 07:37 PM - Re: TBO (YOURTCFG@aol.com)
8. 07:50 PM - Re: TBO (COMMANDER560@cs.com)
9. 08:39 PM - Re: TBO (YOURTCFG@aol.com)
Message 1
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--> Commander-List message posted by: "N414C" <N414C@direcway.com>
How is TBO determined?
Is it a number based on statistics? Or is it based on a wild ass guess?
Milt
Message 2
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--> Commander-List message posted by: "Bill Bow" <bowing74@earthlink.net>
ZACTLY
bilbo
----- Original Message -----
From: "N414C" <N414C@direcway.com>
Subject: Commander-List: TBO
> --> Commander-List message posted by: "N414C" <N414C@direcway.com>
>
> How is TBO determined?
>
> Is it a number based on statistics? Or is it based on a wild ass guess?
> Milt
>
>
>
>
>
>
Message 3
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--> Commander-List message posted by: Chris Schuermann <cschuerm@cox.net>
N414C wrote:
> --> Commander-List message posted by: "N414C" <N414C@direcway.com>
>
> How is TBO determined?
>
> Is it a number based on statistics? Or is it based on a wild ass guess?
> Milt
What a great question. I think I know the answer, but am going to
consult some documentation before venturing a detailed response.
cs
Message 4
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| Subject: | TBO & metal treatments |
--> Commander-List message posted by: "Todd Hindmarsh" <todd@inpnet.org>
Regarding TBO. Has anyone used AvBlend or any other metal treatment to get
more life out of their geared engines?
I've used metal treatments in my cars for years and know that it has done
well for me there. Just wondering if there is a similar result in
aircraft...especially with the cold weather.
Todd
Message 5
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| Subject: | TBO & metal treatments |
--> Commander-List message posted by: "Howard Windham" <bw_cycon@yahoo.com>
Todd, have used Avblend for over 600 hours in my 560e. Engines are at
TBO and show absolutely no sign of any carbon on in the cyclinders. If
it works is anyones guess. It smells like it contains ether, so I guess
that's the cleaning agent. I also have been know to use Marvel Mystery
Oil in the gas. The only down side is the cost. Two cans per engine.
But it makes me feel warm and fuzzy, so I guess it's worth it.
-----Original Message-----
From: owner-commander-list-server@matronics.com
[mailto:owner-commander-list-server@matronics.com] On Behalf Of Todd
Hindmarsh
Subject: Commander-List: TBO & metal treatments
--> Commander-List message posted by: "Todd Hindmarsh" <todd@inpnet.org>
Regarding TBO. Has anyone used AvBlend or any other metal treatment to
get more life out of their geared engines?
I've used metal treatments in my cars for years and know that it has
done well for me there. Just wondering if there is a similar result in
aircraft...especially with the cold weather.
Todd
direct advertising on the Matronics Forums.
Message 6
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--> Commander-List message posted by: Chris Schuermann <cschuerm@cox.net>
> N414C wrote:
>
>>--> Commander-List message posted by: "N414C" <N414C@direcway.com>
>>
>>How is TBO determined?
I was thinking that something in Part 33 addressed this question, but
I've been unable to locate it. The short answer appears to be that the
manufacturer is allowed to set a "recomended TBO", then adjust it as
service history shows is reasonable. There are a lot of older engines
that started life with a much lower TBO recomendation than is shown
today. Over time, the manufacturers upgraded TBO numbers based on how
the engines were surviving in the field. Part 33 specifies a rather
intensive set of stress tests over aprox 150 hours, but doesn't provide
the means to set a TBO.
So, to answer your question, it appears that an initial conservative
"best guess" is made, then adjusted up or down as history is collected.
Does that make us each a test pilot? Some Piper Malibu owners might
say so....
chris
Message 7
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--> Commander-List message posted by: YOURTCFG@aol.com
In a message dated 2/11/03 5:22:06 PM Pacific Standard Time, cschuerm@cox.net
writes:
> So, to answer your question, it appears that an initial conservative
> "best guess" is made, then adjusted up or down as history is collected.
> Does that make us each a test pilot? Some Piper Malibu owners might
> say so....
>
The 560F I feeried (all the way to El Paso) had 1200 tBO engins. The left
was just under 1900, the righ just under 1700, ran great!! jb
Message 8
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--> Commander-List message posted by: COMMANDER560@cs.com
Tells me that those so called weak gears are not weak after all,eh JB, but
you and I and Crunk and the other gearheads know that already, how was the
oil consumption on those engines? Joe
Message 9
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--> Commander-List message posted by: YOURTCFG@aol.com
In a message dated 2/11/03 7:51:10 PM Pacific Standard Time,
COMMANDER560@cs.com writes:
> Tells me that those so called weak gears are not weak after all,eh JB, but
> you and I and Crunk and the other gearheads know that already, how was the
> oil consumption on those engines? Joe
>
I only flew it 1.6, but could not tell that it used any in that time. I
really like the 560F, a great airplane. jb
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