Today's Message Index:
----------------------
1. 05:04 AM - Re: Blown out Wheel pant (bill.peyton)
2. 06:59 AM - Re: Re: Blown out Wheel pant (Seano)
3. 05:54 PM - Re: Re: Rough engine (Chris)
4. 06:12 PM - Re: Re: Rough engine (Linn)
5. 06:12 PM - Re: Re: Rough engine (Danny Riggs)
6. 06:56 PM - Placement and dimensions of access door for HW ER tanks (Duane Wilson)
Message 1
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| Subject: | Re: Blown out Wheel pant |
Sean,
You don't happen to have a photo of your stiffeners do you?
Bill
--------
Bill
WA0SYV
Aviation Partners, LLC
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=394033#394033
Message 2
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| Subject: | Re: Blown out Wheel pant |
I've had a lot of requests to take a picture next time my pants are off ;)
No seriously I'll get one next time.
----- Original Message -----
From: "bill.peyton" <peyton.b@sbcglobal.net>
Sent: Monday, February 11, 2013 6:03 AM
Subject: RV10-List: Re: Blown out Wheel pant
>
> Sean,
> You don't happen to have a photo of your stiffeners do you?
> Bill
>
> --------
> Bill
> WA0SYV
> Aviation Partners, LLC
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=394033#394033
>
>
>
>
>
>
>
>
>
>
Message 3
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| Subject: | Re: Rough engine |
I am glad to hear a root cause was identified and a safe landing was made.
This incident raised a curiosity in me regards to the safety wire. I have
checked my bolts in the last 50 hours and they are fine. They have safety
wire on them but when I removed the safety wire to remove the plate the
bolts were torqued and had plenty of break away torque. So the safety wire
in theory was not "doing anything".
Question is are we suffering from an inappropriate or non-existent torque
value or the need for an initial torque and then a follow-on torque at some
period? The idea being that a proper assembly procedure will never require
the services of the safety wire (although it would always be safetied).
-Chris
N919AR
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Leeverett
Sent: Sunday, February 10, 2013 8:12 PM
Subject: RV10-List: Re: Rough engine
I have a diagnosis for rough engine. I had flown the plane for 10 trouble
free hours. In the pattern the throttle stuck half open. I advanced full
throttle and it ran smoothly. About 10 seconds later the engine started
running rough. I landed uneventfully. Mag check rough on both mags. Throttle
action smooth. I did a compression check today. Cylinders 23456 all
76/80 or better. When I removed plug from #1 the electrode was severely
damaged. Unable to get any compression. I removed the filter air box and
found one of the 4 bolts that holds the box to the servo missing. The bolt
heads were not drilled and I did not safety wire them. I don't know it the
instructions say to or not. So my diagnosis (as a physician I can tell you
that is half the cure) is that the bolt vibrated loose then stuck in the
throttle valve.
When I advanced the throttle the bolt went up the induction , past the
intake valve and into the cylinder where it did its damage. Obviously I will
replace/ safety the bolts, remove and inspect/replace piston, cylinder,
valves rods etc. I will also scope the other cylinders. So I hope everyone
has safeties the bolts.
Leon Everett
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=394012#394012
Message 4
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| Subject: | Re: Rough engine |
On 2/11/2013 8:53 PM, Chris wrote:
>
> I am glad to hear a root cause was identified and a safe landing was made.
>
> This incident raised a curiosity in me regards to the safety wire. I have
> checked my bolts in the last 50 hours and they are fine. They have safety
> wire on them but when I removed the safety wire to remove the plate the
> bolts were torqued and had plenty of break away torque. So the safety wire
> in theory was not "doing anything".
Well, maybe it was. Safetied properly the bolt will not loosen due to
vibration. In the absence of safety wire ..... all bets are off. I
don't want to be the one to research the law of averages ....
> Question is are we suffering from an inappropriate or non-existent torque
> value or the need for an initial torque and then a follow-on torque at some
> period? The idea being that a proper assembly procedure will never require
> the services of the safety wire (although it would always be safetied).
Proper assembly requires proper torque and safety wire if there's any
way the parts being clamped can be worn or squished in operation. If
you absolutely don't want stuff to come apart ... use the safety wire.
All those nutplates or safety nuts you installed .... are subject to
fastener loosening due to vibration. Another good reason to have your
engine dynamically balanced.
Linn
> -Chris
>
> N919AR
Message 5
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| Subject: | Re: Rough engine |
After seeing what one small bolt did to Leon's #1 cylinder I will make sure
that all my bolts within the airflow to the engine are safety wired and no
t rely on torque or torque seal to maintain the bolt grip. There is a lot o
f vibration on these engines and over a period of time it could loosen the
fillings in your mouth! :-)
> From: toaster73@embarqmail.com
> To: rv10-list@matronics.com
> Subject: RE: RV10-List: Re: Rough engine
> Date: Mon=2C 11 Feb 2013 20:53:19 -0500
>
>
> I am glad to hear a root cause was identified and a safe landing was made
.
>
> This incident raised a curiosity in me regards to the safety wire. I have
> checked my bolts in the last 50 hours and they are fine. They have safety
> wire on them but when I removed the safety wire to remove the plate the
> bolts were torqued and had plenty of break away torque. So the safety wir
e
> in theory was not "doing anything".
> Question is are we suffering from an inappropriate or non-existent torque
> value or the need for an initial torque and then a follow-on torque at so
me
> period? The idea being that a proper assembly procedure will never requir
e
> the services of the safety wire (although it would always be safetied).
> -Chris
>
> N919AR
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Leeverett
> Sent: Sunday=2C February 10=2C 2013 8:12 PM
> To: rv10-list@matronics.com
> Subject: RV10-List: Re: Rough engine
>
>
> I have a diagnosis for rough engine. I had flown the plane for 10 troubl
e
> free hours. In the pattern the throttle stuck half open. I advanced full
> throttle and it ran smoothly. About 10 seconds later the engine started
> running rough. I landed uneventfully. Mag check rough on both mags. Throt
tle
> action smooth. I did a compression check today. Cylinders 23456 all
> 76/80 or better. When I removed plug from #1 the electrode was severely
> damaged. Unable to get any compression. I removed the filter air box and
> found one of the 4 bolts that holds the box to the servo missing. The bol
t
> heads were not drilled and I did not safety wire them. I don't know it th
e
> instructions say to or not. So my diagnosis (as a physician I can tell yo
u
> that is half the cure) is that the bolt vibrated loose then stuck in the
> throttle valve.
> When I advanced the throttle the bolt went up the induction =2C past the
> intake valve and into the cylinder where it did its damage. Obviously I w
ill
> replace/ safety the bolts=2C remove and inspect/replace piston=2C cylinde
r=2C
> valves rods etc. I will also scope the other cylinders. So I hope everyon
e
> has safeties the bolts.
> Leon Everett
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=394012#394012
>
>
>
>
>
>
>
>
>
>
>
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>
>
>
Message 6
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| Subject: | Placement and dimensions of access door for HW ER tanks |
I need some dimensions for the access door in each wingtip for the Hotel-Whiskey
extended range tanks.
The wings are 250 miles away, but the wing tips are on the table in front of me.
I marked the center of the fill cap position on the external surface of the wingtip,
but did not mark the outboard edge of the tank on the external surface.
Does anyone have access to the measurement from the outboard rib to the outboard
edge of the ER tank? Or, even easier, what is the distance from the edge of
the top aluminum skin to the outboard edge of the access door?
Thanks
dwilson
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