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Extended full-power in small pistons



 
 
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  #1  
Old January 2nd 09, 03:11 AM posted to rec.aviation.piloting,rec.aviation.student
Mxsmanic
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Posts: 9,169
Default Extended full-power in small pistons

Monk writes:

Here's my crack at answering this question. To operate the engine
above and beyond it's design will result in premature engine wear and
tear. Also at or above the design parameters, the engine is not
getting adequate lubrication and/or cooling, again resulting in
premature wear and tear or possibly even cause engine seizure. This
wear and tear will also shorten the Time Between Overhaul TBO.


Okay, thanks. The last POH I looked at (Bonanza or Baron, not sure which)
said that it was "not recommended," which sounded gentler than "forbidden,"
and implied that it just wasn't a good idea, but wouldn't necessarily cause a
catastrophic failure of the engine.

The POH also seems to imply that operating with full throttle at less than
maximum RPM is okay, and so is operating with maximum RPM but less than full
throttle. I think it also says something about not being at maximum EGT for
too long.

I was mainly worried that exceeding some mysterious limit would cause an
engine failure in flight.
  #2  
Old January 2nd 09, 03:16 AM posted to rec.aviation.piloting,rec.aviation.student
Viperdoc[_6_]
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Posts: 95
Default Extended full-power in small pistons

Anthony, your response again demonstrates your fundamental ignorance about
flying. Since when do throttle and RPM control EGT? What does EGT have to do
with engine performance and longevity? Since when do full throttle and RPM
produce maximum EGT?

It's a good thing you actually don't fly. The limitations in the POH
obviously would not make sense to you, since you don't have a grasp of the
fundamentals of engine operation.



  #3  
Old January 2nd 09, 07:09 PM posted to rec.aviation.piloting,rec.aviation.student
Flydive
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Posts: 92
Default Extended full-power in small pistons

Viperdoc wrote:
Anthony, your response again demonstrates your fundamental ignorance about
flying. Since when do throttle and RPM control EGT? What does EGT have to do
with engine performance and longevity? Since when do full throttle and RPM
produce maximum EGT?

It's a good thing you actually don't fly. The limitations in the POH
obviously would not make sense to you, since you don't have a grasp of the
fundamentals of engine operation.




In his post I don't read anything about RPM or throttle controlling EGT.

You should read more carefully before going all out on your attack.

Can't you guys just answer a question, even if from MX?
Maybe it would be useful for someone else.
  #4  
Old January 2nd 09, 07:52 PM posted to rec.aviation.piloting,rec.aviation.student
Maxwell[_2_]
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Posts: 2,043
Default Extended full-power in small pistons


"Flydive" wrote in message
...
| Viperdoc wrote:
| Anthony, your response again demonstrates your fundamental ignorance
about
| flying. Since when do throttle and RPM control EGT? What does EGT have
to do
| with engine performance and longevity? Since when do full throttle and
RPM
| produce maximum EGT?
|
| It's a good thing you actually don't fly. The limitations in the POH
| obviously would not make sense to you, since you don't have a grasp of
the
| fundamentals of engine operation.
|
|
|
|
| In his post I don't read anything about RPM or throttle controlling EGT.
|
| You should read more carefully before going all out on your attack.
|
| Can't you guys just answer a question, even if from MX?
| Maybe it would be useful for someone else.

He specifically states power and prop settings which directly correlate to
RPM, Manifold Pressure and EGT.

And the question is being posed by Mx, which correlates directly to
bull****.

I would think anyone who has actually operated a gas powered lawnmower or
weed eater would be smart enough to realize the issues with operating at
excessive power and RPM settings. Especially since he proclaims to be an
expert on everything from physics to breast feeding.







  #5  
Old January 2nd 09, 08:09 PM posted to rec.aviation.piloting,rec.aviation.student
Flydive
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Posts: 92
Default Extended full-power in small pistons

Maxwell wrote:

He specifically states power and prop settings which directly correlate to
RPM, Manifold Pressure and EGT.


Not the way I read it:

The POH also seems to imply that operating with full throttle at less than
maximum RPM is okay, and so is operating with maximum RPM but less than full
throttle. I think it also says something about not being at maximum EGT for
too long.



And the question is being posed by Mx, which correlates directly to
bull****.

I would think anyone who has actually operated a gas powered lawnmower or
weed eater would be smart enough to realize the issues with operating at
excessive power and RPM settings. Especially since he proclaims to be an
expert on everything from physics to breast feeding.



That might be, but just answering more bull**** doesn't help someone,
maybe a new pilot, interested in the answer.

It also doesn't help the newsgroup itself, which unfortunately looks
more and more dead, this been one of the reasons
  #6  
Old January 2nd 09, 08:33 PM posted to rec.aviation.piloting,rec.aviation.student
Viperdoc[_6_]
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Posts: 95
Default Extended full-power in small pistons

And what POH are you taking this information from? Are they the one from
Anthony's imagination?

And, what do max throttle and max RPM have to do with EGT, and what do these
have to do with CHT or engine life?

If you know the answer, give him one. Of course, there is no answer, since
his basic premise and assumptions show his ignorance about engines.

This, and any other newsgroup, are dynamic and are going where the threads
take them- they are not the Bible or the constitution- there is nothing
sacred or reverent about it, and there is no making it what you want or
think it should be.


  #7  
Old January 2nd 09, 08:54 PM posted to rec.aviation.piloting,rec.aviation.student
Flydive
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Posts: 92
Default Extended full-power in small pistons

Viperdoc wrote:
And what POH are you taking this information from? Are they the one from
Anthony's imagination?

And, what do max throttle and max RPM have to do with EGT, and what do these
have to do with CHT or engine life?

If you know the answer, give him one. Of course, there is no answer, since
his basic premise and assumptions show his ignorance about engines.

This, and any other newsgroup, are dynamic and are going where the threads
take them- they are not the Bible or the constitution- there is nothing
sacred or reverent about it, and there is no making it what you want or
think it should be.




I did not take it from any POH, I just copy/pasted what MX wrote, and in
that he doesn't say anything about RPM and throttle being related to EGT.
The RPM/Throttle and the max EGT are two separate statements.

RPMs do have something to do engine life, just try to run yours always
at 100%

Then of course you can read it the way it suit best your arguments.

I'm not trying to make this newsgroup the way i like it, but this is a
group about aviation and in general threads should be related to aviation.

Yes i see what kind of character is MX, but quite often his question and
related answers could be quite interesting for someone wanting to learn
about aviation.

It does no good to anybody to answer with insults or the usual "you
don't fly", "simboy" and so on, if not for the ego of the one trying to
come up first with a "wise" comment.

 




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