Page 2 of 2

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Mon Jan 21, 2008 7:18 pm
by adameron@bellsouth.net
'See?, I told you I was missing something. There is a scat hose between the carb. and airbox?
Papa Crash

-------------- Original message ----------------------
From: "John Ellis"
>
> Scat hose between air filter box and the carb..
>
>
>
> ----- Original Message -----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 4:37 PM
> Subject: Re: [fairchildclub] Power surge. Has this happened to you with the
> Ranger 440
>
>
> John
>
> I do not have an engine manual(yet) but this sounds like the problem . I just
> ran it up and down the runway and it it worked fine. Did a last full power run
> up and presto, it came back. Engine backs off to about 1800 rpm. Until I pull
> the throttle back to the approx 1800rpm position it is rough. So when it smooths
> out I pushed it back up and lost power again. The next time, I pulled the
> throttle back till it smoothed out and held it for 10 seconds and pushed it back
> up and I got about 10 seconds of full power. It was like the carb would fill
> back up. So based on what you said I think you have nailed it. What scat hose
> where??
>
>
>
>
> John Ellis wrote:
> I had a problem with our PT-19 sort of like yours. I completed a major
> overhaul of the engine about 18 hours prior to this starting. Engine operation
> was normal in every way.
>
> Takeoff full power everything normal, power reduction to 2200, the engine
> started to run rough, advance back to full power, still rough. Reduce power back
> to 1500 or less, engine smoothed out, ran normal, back to cruse power rough.
>
> I thought it must be mag related problem, went through both mags again, no
> change, then wires, then plugs, then replaced mags from another Ranger, no
> change.
>
> Carb adjustment was checked and was sure carb was OK, had cleaned and checked
> needle/seat, float, checked all AD's complied with,and replaced all gaskets at
> engine major.
>
> Took 2 or 3 other A/P's up to show them problem, No one had a better idea.
>
> Decided to remove and go through carb again.
>
> Problem found when removal of carb was started, scat hose was 2 ply, inner
> part was loose and would fold down and act as a choke.. Hose had been replaced
> at overhaul.
>
> Had about 4 months of spare time fun with this.
>
> John
>
> ----- Original Message -----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 11:13 AM
> Subject: Re: [fairchildclub] Power surge. Has this happened to you with the
> Ranger 440
>
> Super thought but icing conditions did not exist. My cub ices up around 60
> degrees and 50% humidity and I am cautious of it but as you know, It can happen
> anytime when the conditions are met.... It was cold but clear with 35%
> humidity.. Thanks! Michael
>
> Michael Denest wrote: What type aircraft? What was the OAT
> at the time? Where are you located? It is possible that you may have experienced
> carb icing. Did you pull the carb heat on?
>
> Mike
>
> Quando omni flunkus moritati
> (If all else fails, play dead)
> - "Red" Green
>
> ----- Original Message ----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 10:19:28 AM
> Subject: [fairchildclub] Power surge. Has this happened to you with the Ranger
> 440
>
> I am getting a power surge about 6 secends into the takeoff. Static rpm 2100
> and mag checks good. Fuel is full on both tanks and fuel psi is stable on 5 and
> dosnt surge when the engine does. What happened.... I was departing on downwind
> and the engine rolled back to 1800rpm and went rough. I pitched back and landed.
> during the 20 seconds it was rough I checked mags and roughness continued and
> then I pulled the mixture 1/2 way back and nothing so I pushed it in and by then
> it stopped and I was on final.
>
> After landing I ran it up again and got the drop but not roughness. I checked
> plug connections and airfilter and all is well. I went back out and ran it down
> the runway after a static check of about a min and it rolled back again so I
> aborted. This continued... .
>
> Anybody have a guess or has had this happened. I am about to break into the
> plane and start from scratch but was hoping for insight. Fuel was fresh and full
> as the plane is always flown. The engine has 125 smoh.
>
> ------------ --------- --------- ---
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> __________________________________________________________
> Never miss a thing. Make Yahoo your home page.
> http://www.yahoo.com/r/hs
>
> [Non-text portions of this message have been removed]
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
> ---------------------------------
> Never miss a thing. Make Yahoo your homepage.
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Mon Jan 21, 2008 7:40 pm
by David Stroud
'This may or not apply to the situation here, but the symptoms are similar to
those I experienced on a homebuilt with an auto conversion a few years back
and yes..they can bite you. I ran a Holley 2300 carb with a McNeilly mixture
block quite nicely on one engine and then installed it on another engine. I had
to modify the float bowl vent tube which was a brass tube finished off at a 45
degree angle upwards for the second engine in order to fit under the new air box.

Long story short, the engine would start, run up perfectly, take off with full power
then, at about 20 seconds into the climb, the bugger would falter, run very rough
etc. till I leveled off ....and level off I did but at low altitude. I could gain full speed,
climb a bit and the same damn thing would repeat itself, over and over again.

Not sure what, but somehow I had buggerd up the airflow near that vent to the extent
that it would lean out in a high attitude full power situation. Food for thought? Anything
changed under your hood? Any vents or anything near them modified?

David Stroud Ottawa, Canada
C-FDWS Christavia
Fairchild 51 under construction

----- Original Message -----
From: michael Steiger
To: fairchildclub@yahoogroups.com
Sent: Monday, January 21, 2008 6:57 PM
Subject: Re: [fairchildclub] Power surge. Has this happened to you with the Ranger 440


THANKS It is a Stromburg carb but I will review the ADs..

Dan Casali wrote: This sounds a lot like the symptom you'd get if you have a Marvel
Schleber carb and the venturi AD hasn't been properly complied with. The
AD requires the two part venturi be replaced with a single part unit.
The two halves apparently can get askew, choking the carb throat and
causing an over-rich mixture. Pulling a plug may show a sooted up tip.

Cliff McClinney bought the farm in his PT 26 from this; apparently the
logged AD compliance never happened. So be careful.

Dan Casali

michael Steiger wrote:
>
> I am getting a power surge about 6 secends into the takeoff. Static
> rpm 2100 and mag checks good. Fuel is full on both tanks and fuel psi
> is stable on 5 and dosnt surge when the engine does. What happened....
> I was departing on downwind and the engine rolled back to 1800rpm and
> went rough. I pitched back and landed. during the 20 seconds it was
> rough I checked mags and roughness continued and then I pulled the
> mixture 1/2 way back and nothing so I pushed it in and by then it
> stopped and I was on final.
>
> After landing I ran it up again and got the drop but not roughness. I
> checked plug connections and airfilter and all is well. I went back
> out and ran it down the runway after a static check of about a min and
> it rolled back again so I aborted. This continued....
>
> Anybody have a guess or has had this happened. I am about to break
> into the plane and start from scratch but was hoping for insight. Fuel
> was fresh and full as the plane is always flown. The engine has 125 smoh.
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try
> it now.
>
> [
>

[Non-text portions of this message have been removed]

---------------------------------
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------------------------------------------------------------------------------


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[Non-text portions of this message have been removed]
'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Mon Jan 21, 2008 7:47 pm
by Tom Mueller
'Double check the carburetor control linkage, make certain you're
getting full rich (all the way against the carburetor stop) with the
mixture control knob pushed in. Sure sounds like fuel problem?running
a tad lean at full power. It may not show on static check because
takeoff max rpm is not being achieved. Just a thought I love these old
Birds, but they have a habit of scaring the crap out of you every once
in a while.
Tom'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Tue Jan 22, 2008 9:47 am
by michael Steiger
'Good idea!!! It is a fuel problem thats for sure.

Tom Mueller wrote:
Double check the carburetor control linkage, make certain you're
getting full rich (all the way against the carburetor stop) with the
mixture control knob pushed in. Sure sounds like fuel problem?running
a tad lean at full power. It may not show on static check because
takeoff max rpm is not being achieved. Just a thought I love these old
Birds, but they have a habit of scaring the crap out of you every once
in a while.
Tom






---------------------------------
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[Non-text portions of this message have been removed]'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Tue Jan 22, 2008 9:48 am
by michael Steiger
'Nothing was changed at all.One day good, one day bad. Removing the carb for overhaul today. Thanks

david stroud wrote: This may or not apply to the situation here, but the symptoms are similar to
those I experienced on a homebuilt with an auto conversion a few years back
and yes..they can bite you. I ran a Holley 2300 carb with a McNeilly mixture
block quite nicely on one engine and then installed it on another engine. I had
to modify the float bowl vent tube which was a brass tube finished off at a 45
degree angle upwards for the second engine in order to fit under the new air box.

Long story short, the engine would start, run up perfectly, take off with full power
then, at about 20 seconds into the climb, the bugger would falter, run very rough
etc. till I leveled off ....and level off I did but at low altitude. I could gain full speed,
climb a bit and the same damn thing would repeat itself, over and over again.

Not sure what, but somehow I had buggerd up the airflow near that vent to the extent
that it would lean out in a high attitude full power situation. Food for thought? Anything
changed under your hood? Any vents or anything near them modified?

David Stroud Ottawa, Canada
C-FDWS Christavia
Fairchild 51 under construction
----- Original Message -----
From: michael Steiger
To: fairchildclub@yahoogroups.com
Sent: Monday, January 21, 2008 6:57 PM
Subject: Re: [fairchildclub] Power surge. Has this happened to you with the Ranger 440

THANKS It is a Stromburg carb but I will review the ADs..

Dan Casali wrote: This sounds a lot like the symptom you'd get if you have a Marvel
Schleber carb and the venturi AD hasn't been properly complied with. The
AD requires the two part venturi be replaced with a single part unit.
The two halves apparently can get askew, choking the carb throat and
causing an over-rich mixture. Pulling a plug may show a sooted up tip.

Cliff McClinney bought the farm in his PT 26 from this; apparently the
logged AD compliance never happened. So be careful.

Dan Casali

michael Steiger wrote:
>
> I am getting a power surge about 6 secends into the takeoff. Static
> rpm 2100 and mag checks good. Fuel is full on both tanks and fuel psi
> is stable on 5 and dosnt surge when the engine does. What happened....
> I was departing on downwind and the engine rolled back to 1800rpm and
> went rough. I pitched back and landed. during the 20 seconds it was
> rough I checked mags and roughness continued and then I pulled the
> mixture 1/2 way back and nothing so I pushed it in and by then it
> stopped and I was on final.
>
> After landing I ran it up again and got the drop but not roughness. I
> checked plug connections and airfilter and all is well. I went back
> out and ran it down the runway after a static check of about a min and
> it rolled back again so I aborted. This continued....
>
> Anybody have a guess or has had this happened. I am about to break
> into the plane and start from scratch but was hoping for insight. Fuel
> was fresh and full as the plane is always flown. The engine has 125 smoh.
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try
> it now.
>
> [
>

[Non-text portions of this message have been removed]

---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

[Non-text portions of this message have been removed]

----------------------------------------------------------

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.8/1235 - Release Date: 1/21/08 9:39 AM

[Non-text portions of this message have been removed]






---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

[Non-text portions of this message have been removed]
'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Tue Jan 22, 2008 9:51 am
by michael Steiger
'Figured out what you were saying. Pulling it today while removing carb and it seems possible except it is only connecting the 2 intake components that are seperated by 1/4 of an inch. Still it is an item to look at. Thanks

adameron@bellsouth.net wrote: See?, I told you I was missing something. There is a scat hose between the carb. and airbox?
Papa Crash

-------------- Original message ----------------------
From: "John Ellis"
>
> Scat hose between air filter box and the carb..
>
>
>
> ----- Original Message -----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 4:37 PM
> Subject: Re: [fairchildclub] Power surge. Has this happened to you with the
> Ranger 440
>
>
> John
>
> I do not have an engine manual(yet) but this sounds like the problem . I just
> ran it up and down the runway and it it worked fine. Did a last full power run
> up and presto, it came back. Engine backs off to about 1800 rpm. Until I pull
> the throttle back to the approx 1800rpm position it is rough. So when it smooths
> out I pushed it back up and lost power again. The next time, I pulled the
> throttle back till it smoothed out and held it for 10 seconds and pushed it back
> up and I got about 10 seconds of full power. It was like the carb would fill
> back up. So based on what you said I think you have nailed it. What scat hose
> where??
>
>
>
>
> John Ellis wrote:
> I had a problem with our PT-19 sort of like yours. I completed a major
> overhaul of the engine about 18 hours prior to this starting. Engine operation
> was normal in every way.
>
> Takeoff full power everything normal, power reduction to 2200, the engine
> started to run rough, advance back to full power, still rough. Reduce power back
> to 1500 or less, engine smoothed out, ran normal, back to cruse power rough.
>
> I thought it must be mag related problem, went through both mags again, no
> change, then wires, then plugs, then replaced mags from another Ranger, no
> change.
>
> Carb adjustment was checked and was sure carb was OK, had cleaned and checked
> needle/seat, float, checked all AD's complied with,and replaced all gaskets at
> engine major.
>
> Took 2 or 3 other A/P's up to show them problem, No one had a better idea.
>
> Decided to remove and go through carb again.
>
> Problem found when removal of carb was started, scat hose was 2 ply, inner
> part was loose and would fold down and act as a choke.. Hose had been replaced
> at overhaul.
>
> Had about 4 months of spare time fun with this.
>
> John
>
> ----- Original Message -----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 11:13 AM
> Subject: Re: [fairchildclub] Power surge. Has this happened to you with the
> Ranger 440
>
> Super thought but icing conditions did not exist. My cub ices up around 60
> degrees and 50% humidity and I am cautious of it but as you know, It can happen
> anytime when the conditions are met.... It was cold but clear with 35%
> humidity.. Thanks! Michael
>
> Michael Denest wrote: What type aircraft? What was the OAT
> at the time? Where are you located? It is possible that you may have experienced
> carb icing. Did you pull the carb heat on?
>
> Mike
>
> Quando omni flunkus moritati
> (If all else fails, play dead)
> - "Red" Green
>
> ----- Original Message ----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 10:19:28 AM
> Subject: [fairchildclub] Power surge. Has this happened to you with the Ranger
> 440
>
> I am getting a power surge about 6 secends into the takeoff. Static rpm 2100
> and mag checks good. Fuel is full on both tanks and fuel psi is stable on 5 and
> dosnt surge when the engine does. What happened.... I was departing on downwind
> and the engine rolled back to 1800rpm and went rough. I pitched back and landed.
> during the 20 seconds it was rough I checked mags and roughness continued and
> then I pulled the mixture 1/2 way back and nothing so I pushed it in and by then
> it stopped and I was on final.
>
> After landing I ran it up again and got the drop but not roughness. I checked
> plug connections and airfilter and all is well. I went back out and ran it down
> the runway after a static check of about a min and it rolled back again so I
> aborted. This continued... .
>
> Anybody have a guess or has had this happened. I am about to break into the
> plane and start from scratch but was hoping for insight. Fuel was fresh and full
> as the plane is always flown. The engine has 125 smoh.
>
> ------------ --------- --------- ---
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> __________________________________________________________
> Never miss a thing. Make Yahoo your home page.
> http://www.yahoo.com/r/hs
>
> [Non-text portions of this message have been removed]
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
> ---------------------------------
> Never miss a thing. Make Yahoo your homepage.
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>





---------------------------------
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[Non-text portions of this message have been removed]'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Tue Jan 22, 2008 9:54 am
by michael Steiger
'Got it.. The gap it covers is only a 1/4inch wide. Seems the scat could not block too much off but I will be chacking it out. It is usually something you discount so I will reall check it when I pull the carb...Thank you, Michael

John Ellis wrote: Scat hose between air filter box and the carb..
----- Original Message -----
From: michael Steiger
To: fairchildclub@yahoogroups.com
Sent: Monday, January 21, 2008 4:37 PM
Subject: Re: [fairchildclub] Power surge. Has this happened to you with the Ranger 440

John

I do not have an engine manual(yet) but this sounds like the problem . I just ran it up and down the runway and it it worked fine. Did a last full power run up and presto, it came back. Engine backs off to about 1800 rpm. Until I pull the throttle back to the approx 1800rpm position it is rough. So when it smooths out I pushed it back up and lost power again. The next time, I pulled the throttle back till it smoothed out and held it for 10 seconds and pushed it back up and I got about 10 seconds of full power. It was like the carb would fill back up. So based on what you said I think you have nailed it. What scat hose where??

John Ellis wrote:
I had a problem with our PT-19 sort of like yours. I completed a major overhaul of the engine about 18 hours prior to this starting. Engine operation was normal in every way.

Takeoff full power everything normal, power reduction to 2200, the engine started to run rough, advance back to full power, still rough. Reduce power back to 1500 or less, engine smoothed out, ran normal, back to cruse power rough.

I thought it must be mag related problem, went through both mags again, no
change, then wires, then plugs, then replaced mags from another Ranger, no change.

Carb adjustment was checked and was sure carb was OK, had cleaned and checked needle/seat, float, checked all AD's complied with,and replaced all gaskets at engine major.

Took 2 or 3 other A/P's up to show them problem, No one had a better idea.

Decided to remove and go through carb again.

Problem found when removal of carb was started, scat hose was 2 ply, inner part was loose and would fold down and act as a choke.. Hose had been replaced at overhaul.

Had about 4 months of spare time fun with this.

John

----- Original Message -----
From: michael Steiger
To: fairchildclub@yahoogroups.com
Sent: Monday, January 21, 2008 11:13 AM
Subject: Re: [fairchildclub] Power surge. Has this happened to you with the Ranger 440

Super thought but icing conditions did not exist. My cub ices up around 60 degrees and 50% humidity and I am cautious of it but as you know, It can happen anytime when the conditions are met.... It was cold but clear with 35% humidity.. Thanks! Michael

Michael Denest wrote: What type aircraft? What was the OAT at the time? Where are you located? It is possible that you may have experienced carb icing. Did you pull the carb heat on?

Mike

Quando omni flunkus moritati
(If all else fails, play dead)
- "Red" Green

----- Original Message ----
From: michael Steiger
To: fairchildclub@yahoogroups.com
Sent: Monday, January 21, 2008 10:19:28 AM
Subject: [fairchildclub] Power surge. Has this happened to you with the Ranger 440

I am getting a power surge about 6 secends into the takeoff. Static rpm 2100 and mag checks good. Fuel is full on both tanks and fuel psi is stable on 5 and dosnt surge when the engine does. What happened.... I was departing on downwind and the engine rolled back to 1800rpm and went rough. I pitched back and landed. during the 20 seconds it was rough I checked mags and roughness continued and then I pulled the mixture 1/2 way back and nothing so I pushed it in and by then it stopped and I was on final.

After landing I ran it up again and got the drop but not roughness. I checked plug connections and airfilter and all is well. I went back out and ran it down the runway after a static check of about a min and it rolled back again so I aborted. This continued... .

Anybody have a guess or has had this happened. I am about to break into the plane and start from scratch but was hoping for insight. Fuel was fresh and full as the plane is always flown. The engine has 125 smoh.

------------ --------- --------- ---
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

[Non-text portions of this message have been removed]

__________________________________________________________
Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs

[Non-text portions of this message have been removed]

---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

---------------------------------
Never miss a thing. Make Yahoo your homepage.

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]






---------------------------------
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[Non-text portions of this message have been removed]
'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Tue Jan 22, 2008 10:07 am
by adameron@bellsouth.net
'-------------- Original message ----------------------
From: michael Steiger
>
> Nothing was changed at all.One day good, one day bad. Removing the carb for
> overhaul today. Thanks
>
> david stroud wrote: This may or not apply to the
> situation here, but the symptoms are similar to
> those I experienced on a homebuilt with an auto conversion a few years back
> and yes..they can bite you. I ran a Holley 2300 carb with a McNeilly mixture
> block quite nicely on one engine and then installed it on another engine. I had
> to modify the float bowl vent tube which was a brass tube finished off at a 45
> degree angle upwards for the second engine in order to fit under the new air
> box.
>
> Long story short, the engine would start, run up perfectly, take off with full
> power
> then, at about 20 seconds into the climb, the bugger would falter, run very
> rough
> etc. till I leveled off ....and level off I did but at low altitude. I could
> gain full speed,
> climb a bit and the same damn thing would repeat itself, over and over again.
>
> Not sure what, but somehow I had buggerd up the airflow near that vent to the
> extent
> that it would lean out in a high attitude full power situation. Food for
> thought? Anything
> changed under your hood? Any vents or anything near them modified?
>
> David Stroud Ottawa, Canada
> C-FDWS Christavia
> Fairchild 51 under construction
>
> ----- Original Message -----
> From: michael Steiger
> To: fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 6:57 PM
> Subject: Re: [fairchildclub] Power surge. Has this happened to you with the
> Ranger 440
>
> THANKS It is a Stromburg carb but I will review the ADs..
>
> Dan Casali wrote: This sounds a lot like the symptom you'd
> get if you have a Marvel
> Schleber carb and the venturi AD hasn't been properly complied with. The
> AD requires the two part venturi be replaced with a single part unit.
> The two halves apparently can get askew, choking the carb throat and
> causing an over-rich mixture. Pulling a plug may show a sooted up tip.
>
> Cliff McClinney bought the farm in his PT 26 from this; apparently the
> logged AD compliance never happened. So be careful.
>
> Dan Casali
>
> michael Steiger wrote:
> >
> > I am getting a power surge about 6 secends into the takeoff. Static
> > rpm 2100 and mag checks good. Fuel is full on both tanks and fuel psi
> > is stable on 5 and dosnt surge when the engine does. What happened....
> > I was departing on downwind and the engine rolled back to 1800rpm and
> > went rough. I pitched back and landed. during the 20 seconds it was
> > rough I checked mags and roughness continued and then I pulled the
> > mixture 1/2 way back and nothing so I pushed it in and by then it
> > stopped and I was on final.
> >
> > After landing I ran it up again and got the drop but not roughness. I
> > checked plug connections and airfilter and all is well. I went back
> > out and ran it down the runway after a static check of about a min and
> > it rolled back again so I aborted. This continued....
> >
> > Anybody have a guess or has had this happened. I am about to break
> > into the plane and start from scratch but was hoping for insight. Fuel
> > was fresh and full as the plane is always flown. The engine has 125 smoh.
> >
> > ---------------------------------
> > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try
> > it now.
> >
> > [
> >
>
> [Non-text portions of this message have been removed]
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> ----------------------------------------------------------
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
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Re: Power surge. Has this happened to you with the Ranger 440

Posted: Tue Jan 29, 2008 12:57 pm
by Curt Kinchen
'You might also check your fuel lines, if you have any that are non-
metallic. Another thing that can cause erratic running is
a "flapper" inside of a fuel flex hose - ( a small flap of rubber
caused by the hose being made without a mandrel).

--- In fairchildclub@yahoogroups.com, adameron@... wrote:
>
>
>
>
> -------------- Original message ----------------------
> From: michael Steiger
> >
> > Nothing was changed at all.One day good, one day bad. Removing
the carb for
> > overhaul today. Thanks
> >
> > david stroud wrote: This may or not apply
to the
> > situation here, but the symptoms are similar to
> > those I experienced on a homebuilt with an auto conversion a few
years back
> > and yes..they can bite you. I ran a Holley 2300 carb with a
McNeilly mixture
> > block quite nicely on one engine and then installed it on another
engine. I had
> > to modify the float bowl vent tube which was a brass tube
finished off at a 45
> > degree angle upwards for the second engine in order to fit under
the new air
> > box.
> >
> > Long story short, the engine would start, run up perfectly, take
off with full
> > power
> > then, at about 20 seconds into the climb, the bugger would
falter, run very
> > rough
> > etc. till I leveled off ....and level off I did but at low
altitude. I could
> > gain full speed,
> > climb a bit and the same damn thing would repeat itself, over and
over again.
> >
> > Not sure what, but somehow I had buggerd up the airflow near that
vent to the
> > extent
> > that it would lean out in a high attitude full power situation.
Food for
> > thought? Anything
> > changed under your hood? Any vents or anything near them modified?
> >
> > David Stroud Ottawa, Canada
> > C-FDWS Christavia
> > Fairchild 51 under construction
> >
> > ----- Original Message -----
> > From: michael Steiger
> > To: fairchildclub@yahoogroups.com
> > Sent: Monday, January 21, 2008 6:57 PM
> > Subject: Re: [fairchildclub] Power surge. Has this happened to
you with the
> > Ranger 440
> >
> > THANKS It is a Stromburg carb but I will review the ADs..
> >
> > Dan Casali wrote: This sounds a lot like the
symptom you'd
> > get if you have a Marvel
> > Schleber carb and the venturi AD hasn't been properly complied
with. The
> > AD requires the two part venturi be replaced with a single part
unit.
> > The two halves apparently can get askew, choking the carb throat
and
> > causing an over-rich mixture. Pulling a plug may show a sooted up
tip.
> >
> > Cliff McClinney bought the farm in his PT 26 from this;
apparently the
> > logged AD compliance never happened. So be careful.
> >
> > Dan Casali
> >
> > michael Steiger wrote:
> > >
> > > I am getting a power surge about 6 secends into the takeoff.
Static
> > > rpm 2100 and mag checks good. Fuel is full on both tanks and
fuel psi
> > > is stable on 5 and dosnt surge when the engine does. What
happened....
> > > I was departing on downwind and the engine rolled back to
1800rpm and
> > > went rough. I pitched back and landed. during the 20 seconds it
was
> > > rough I checked mags and roughness continued and then I pulled
the
> > > mixture 1/2 way back and nothing so I pushed it in and by then
it
> > > stopped and I was on final.
> > >
> > > After landing I ran it up again and got the drop but not
roughness. I
> > > checked plug connections and airfilter and all is well. I went
back
> > > out and ran it down the runway after a static check of about a
min and
> > > it rolled back again so I aborted. This continued....
> > >
> > > Anybody have a guess or has had this happened. I am about to
break
> > > into the plane and start from scratch but was hoping for
insight. Fuel
> > > was fresh and full as the plane is always flown. The engine has
125 smoh.
> > >
> > > ---------------------------------
> > > Be a better friend, newshound, and know-it-all with Yahoo!
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> > > it now.
> > >
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> > >
> >
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> > Checked by AVG Free Edition.
> > Version: 7.5.516 / Virus Database: 269.19.8/1235 - Release Date:
1/21/08 9:39 AM
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> >
> > ---------------------------------
> > Be a better friend, newshound, and know-it-all with Yahoo!
Mobile. Try it now.
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> >
>
'

Re: Power surge. Has this happened to you with the Ranger 440

Posted: Sun Feb 03, 2008 2:11 pm
by Tom Mueller
'Michael,

You've probably removed your carb by now, but thought you may want to
review this u.k. accident report.

http://www.aaib.dft.gov.uk/cms_resources/dft_avsafety_pdf_500172.pdf

Tom
Hanford,Ca'