Today's Message Index:
----------------------
1. 12:25 PM - FAB and carb wear, '98 FP O-320 RV-6A (sportav8r@aol.com)
2. 12:45 PM - Re: FAB and carb wear, '98 FP O-320 RV-6A (BOB martin)
3. 02:03 PM - Re: FAB and carb wear, '98 FP O-320 RV-6A (Larry Bowen)
Message 1
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| Subject: | FAB and carb wear, '98 FP O-320 RV-6A |
--> RVSouthEast-List message posted by: sportav8r@aol.com
Checking some incidental things after the fuel tank SB was done (unusable fuel
quantity and flow rates from each tank) I discovered how much havoc the engine
vibes have been wreaking on FWF stuff since my last good look in there. The
carb heat flapper in the FAB has broken a hinge eyelet, the hinge has cracked
away from one side of the FAB fiberglass sidewall, the flap itself, which used
to lie flush inside a slightly smaller hot air intake hole, has fretted its way
all the way through the aluminum FAB top so that in the full-open position
it actually leaks induction air out the top of the FAB. Most distressing to me
was the realization that the vibration-motion of the FAB against the lower cowl
intake scoop had caused the carb halves to fret and loosen considerably on
their gasket, even though the 4 screws holding the upper and lower carb halves
remain firmly safetied in their original positions. The FAB and lower carb
body to which it is bolted can be rocked easily left-
to-right with trivial pressure on the air inlet portion of the FAB.
I had noted the abrupt appearance of gel-coat cracks in the cowling around all
the front openings since my prop was balanced 2 years ago, and now this... The
prop and engine are much smoother-running than ever, but fatigue/wear seems
to be escalating. Probably a coincidental observation on an airframe that is
starting to show its 580 hours, but curious just the same. Maybe I can blame
this on the P-mags ;-) ...not.
I'm curious whether anyone else has experienced this thing with their carb and
FAB gradually coming apart in pieces.
-Stormy
Message 2
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| Subject: | FAB and carb wear, '98 FP O-320 RV-6A |
--> RVSouthEast-List message posted by: "BOB martin" <libertyva@msn.com>
Stormy,
Good timing on this subject.
Last years condition inspection on Larry's RV-6 (450tt)we did some
reinforcing fiberglass layups on the bottom of the FAB, where the K&N filter
rubber ridges were wearing thru the bottom.
Right now, I'm doing the condition inspection on My RV-6 (500tt) and found
the same thing.
No problems with the Carb.......but will be looking closer Saturday now :-)
Thanks for the update.
Bob Martin--o-360 C/s larry's is 0-360 with f/p neither one
balanced yet! but soon.
Louisa VA
>From: sportav8r@aol.com
>To: rv-list@matronics.com, rvsoutheast-list@matronics.com
>Subject: RVSouthEast-List: FAB and carb wear, '98 FP O-320 RV-6A
>Date: Thu, 11 May 2006 15:24:08 -0400
>
>--> RVSouthEast-List message posted by: sportav8r@aol.com
>
>Checking some incidental things after the fuel tank SB was done (unusable
>fuel quantity and flow rates from each tank) I discovered how much havoc
>the engine vibes have been wreaking on FWF stuff since my last good look in
>there. The carb heat flapper in the FAB has broken a hinge eyelet, the
>hinge has cracked away from one side of the FAB fiberglass sidewall, the
>flap itself, which used to lie flush inside a slightly smaller hot air
>intake hole, has fretted its way all the way through the aluminum FAB top
>so that in the full-open position it actually leaks induction air out the
>top of the FAB. Most distressing to me was the realization that the
>vibration-motion of the FAB against the lower cowl intake scoop had caused
>the carb halves to fret and loosen considerably on their gasket, even
>though the 4 screws holding the upper and lower carb halves remain firmly
>safetied in their original positions. The FAB and lower carb body to which
>it is bolted can be rocked easily left-
> to-right with trivial pressure on the air inlet portion of the FAB.
>
>I had noted the abrupt appearance of gel-coat cracks in the cowling around
>all the front openings since my prop was balanced 2 years ago, and now
>this... The prop and engine are much smoother-running than ever, but
>fatigue/wear seems to be escalating. Probably a coincidental observation
>on an airframe that is starting to show its 580 hours, but curious just the
>same. Maybe I can blame this on the P-mags ;-) ...not.
>
>I'm curious whether anyone else has experienced this thing with their carb
>and FAB gradually coming apart in pieces.
>
>-Stormy
>
>
Message 3
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| Subject: | FAB and carb wear, '98 FP O-320 RV-6A |
--> RVSouthEast-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
I looked a that area on mine just last night. Seemed to be in good shape,
but I'm only at a measly 180 Hrs.
-
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com
> -----Original Message-----
> From: sportav8r@aol.com [mailto:sportav8r@aol.com]
> Sent: Thursday, May 11, 2006 3:24 PM
> To: rv-list@matronics.com; rvsoutheast-list@matronics.com
> Subject: RVSouthEast-List: FAB and carb wear, '98 FP O-320 RV-6A
>
> --> RVSouthEast-List message posted by: sportav8r@aol.com
>
....
>
> I'm curious whether anyone else has experienced this thing
> with their carb and FAB gradually coming apart in pieces.
>
> -Stormy
>
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