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Slick mags/bendix mags

 
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Charles Heathco



Joined: 10 Jan 2006
Posts: 201

PostPosted: Mon Sep 01, 2008 5:29 am    Post subject: Slick mags/bendix mags Reply with quote

My 2 cents. I had bendix on my cherokee, rt failed while truning base, scared the crap out of me initially, have had 2 bendix go bad on my initial engine on my 6A, one which had only 20 hrs on overhaul. Relitivly low time. I have slicks on the relativly low time used engine I installed 3 anuals back, nary a peap of trouble. timing spot on all trhee anualls. Guess what my favorite brand is? Charlie Heathco
[quote][b]


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rickpegser(at)yahoo.com
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PostPosted: Mon Sep 01, 2008 5:30 pm    Post subject: Slick mags/bendix mags Reply with quote

charles

i have to ask a couple of questions, how many hrs. on the rt mag. the two bendix on the 6a what was the hours on the mags and what was the condition of the engine, who did the overhaul, you, an a+p, or a mag shop. and for those of you that think timing will tell you the mag is ok, you are wrong it only tells you that the cam has not fallen part. it doe's not tell you what is going on with the rotor.
rick
--- On Mon, 9/1/08, Charles Heathco <cheathco(at)cox.net> wrote:

Quote:
From: Charles Heathco <cheathco(at)cox.net>
Subject: Slick mags/bendix mags
To: "rv-list" <rv-list(at)matronics.com>
Date: Monday, September 1, 2008, 6:25 AM
My 2 cents. I had bendix on my cherokee, rt failed while
truning base, scared the crap out of me initially, have had
2 bendix go bad on my initial engine on my 6A, one which had
only 20 hrs on overhaul. Relitivly low time. I have slicks
on the relativly low time used engine I installed 3 anuals
back, nary a peap of trouble. timing spot on all trhee
anualls. Guess what my favorite brand is? Charlie Heathco


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tcolson(at)cedar-rapids.n
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PostPosted: Tue Sep 02, 2008 6:32 pm    Post subject: Slick mags/bendix mags Reply with quote

There is a known Bendix (S4LN-20) issue on O-360s with certain aluminum props. Lycoming even made a mag isolator to rubber damp the right mag from the engine drive gear. This is on some Piper singles. In 1100 hours on my RV6A with an O-360 and Sensenich prop I have had 3 timing gear faults, 1 Capacitor fault, 1 Mag shaft breaking in half, and decided to throw in the towel when the mounting ear started to crack. I had about 200 Hours operation per fix. Believe it or not , the mag shaft breaking in half still left the unit operational. Can't say that about the capacitor or timing gears.

The Left Mag has never failed working flawlessly for all 1100 hours.

I would like to know if anyone else has seen this on their RVs and an FYI to those planning to use this mag with their sensenich prop. I don't know if there is an issue with my engine or just the same problem Piper once had.

I now have a lightspeed on the right side with about 70 Hours. It works about the same as the Bendix Mag on the left.

Rgds
Tom Olson
[quote] ---


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Gary.A.Sobek



Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA

PostPosted: Tue Sep 02, 2008 7:16 pm    Post subject: Slick mags/bendix mags Reply with quote

S4LN20 and S4LN21 both ran 2 C100 hours and were removed working.  I am the guy that overhauled both of them before putting them on my RV-6  11 years ago.

Gary A. Sobek
"My Sanity" RV-6 N157GS O-320 Hartzell C
2 C159 + Flying Hours So. CA C USA

From: tcolson(at)cedar-rapids.net
To: rv-list(at)matronics.com
Subject: Re: Slick mags/bendix mags
Date: Tue C 2 Sep 2008 21:31:11 -0500

There is a known Bendix (S4LN-20) issue on O-360s with certain aluminum props.  Lycoming even made a mag isolator to rubber damp the right mag from the engine drive gear.  This is on some Piper singles.  In 1100 hours on my RV6A  with an O-360  and Sensenich prop I have had 3 timing gear faults C 1 Capacitor fault C 1 Mag shaft breaking in half C and decided to throw in the towel when the mounting ear started to crack.  I had about 200 Hours operation per fix.   Believe it or not C the mag shaft breaking in half still left the unit operational.  Can't say that about the capacitor or timing gears. 
 
The Left Mag has never failed working flawlessly for all 1100 hours.
 
I would like to know if anyone else has seen this on their RVs and an FYI to those planning to use this mag with their sensenich prop.  I don't know if there is an issue with my engine or just the same problem Piper once had.
 
I now have a lightspeed on the right side with about 70 Hours.  It works about the same as the Bendix Mag on the left.
 
Rgds
Tom Olson
[quote] ---


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rickpegser(at)yahoo.com
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PostPosted: Tue Sep 02, 2008 8:17 pm    Post subject: Slick mags/bendix mags Reply with quote

i just rechecked the last ten years of bendix service bulletins, and not counting the known inpluse problem, and cap problems both that where solved and paid for by tmc, there was a couple of installation issues, but that was not a tmc/bendix fault. slick has yet to pay for any of the problems that has been created by thier issues and they have known about the problem for the last two years, yet still keep selling a defective product.

individual airframes and equipment can cause a harmonic issue, if a vibration is introduced into the airframe that is at the natural resonant freq, of the part, the part will explode. is this a problem of the engine manufacture, yes and no. the engine manufacture knows what freqs have to be avoided. and the airframe manufacture is given this info. it is not up to the engine manufacturer to test all installs that the airframe types do. tmc went after this harmonic and solved it. it was not a magneto problem, it was a system vibration problem. it was limited a unique installation, that was poorly tested by the manufacturer. so this is not a problem to blame on tmc it is a problem to blame on piper. so before you start to throw blame around know what caused the failure.

rick
--- On Tue, 9/2/08, RV6 Flyer <rv6_flyer(at)hotmail.com> wrote:

[quote] From: RV6 Flyer <rv6_flyer(at)hotmail.com>
Subject: RE: Slick mags/bendix mags
To: rv-list(at)matronics.com
Date: Tuesday, September 2, 2008, 8:15 PM
S4LN20 and S4LN21 both ran 2,100 hours and were removed
working. I am the guy that overhauled both of them before
putting them on my RV-6 11 years ago.

Gary A. Sobek

"My Sanity" RV-6 N157GS O-320 Hartzell,

2,159 + Flying Hours So. CA, USA

From: tcolson(at)cedar-rapids.net
To: rv-list(at)matronics.com
Subject: Re: Slick mags/bendix mags
Date: Tue, 2 Sep 2008 21:31:11 -0500










There is a known Bendix (S4LN-20) issue on O-360s
with certain aluminum props. Lycoming even made a mag
isolator to rubber
damp the right mag from the engine drive gear. This is on
some Piper
singles. In 1100 hours on my RV6A
with an O-360 and Sensenich prop I have had 3 timing gear
faults, 1
Capacitor fault, 1 Mag shaft breaking in half, and decided
to throw in the towel
when the mounting ear started to crack. I had about 200
Hours operation
per fix. Believe it or not , the mag shaft breaking in
half still
left the unit operational. Can't say that about the
capacitor or
timing gears.

The Left Mag has never failed working flawlessly
for all 1100 hours.

I would like to know if anyone else has seen this
on their RVs and an FYI to those planning to use this mag
with their sensenich
prop. I don't know if there is an issue with my engine
or just the same
problem Piper once had.

I now have a lightspeed on the right side with
about 70 Hours. It works about the same as the Bendix Mag
on the
left.

Rgds
Tom Olson

---


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pitts_pilot(at)bellsouth.
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PostPosted: Wed Sep 03, 2008 4:55 am    Post subject: Slick mags/bendix mags Reply with quote

I sure wish you lived near me!!! My mag overhaul guys (locally) are
dwindling due to old age. It looks like overhauling mags is a dying art.
Linn
RV6 Flyer wrote:
Quote:
S4LN20 and S4LN21 both ran 2,100 hours and were removed working. I am
the guy that overhauled both of them before putting them on my RV-6
11 years ago.

Gary A. Sobek
"My Sanity" RV-6 N157GS O-320 Hartzell,
2,159 + Flying Hours So. CA, USA


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rickpegser(at)yahoo.com
Guest





PostPosted: Thu Sep 04, 2008 11:47 am    Post subject: Slick mags/bendix mags Reply with quote

send them to savage magneto in hayward,ca. he does mine, or bench checks them after i do them in house. rick
--- On Wed, 9/3/08, linn Walters <pitts_pilot(at)bellsouth.net> wrote:

Quote:
From: linn Walters <pitts_pilot(at)bellsouth.net>
Subject: Re: Slick mags/bendix mags
To: rv-list(at)matronics.com
Date: Wednesday, September 3, 2008, 5:53 AM

<pitts_pilot(at)bellsouth.net>

I sure wish you lived near me!!! My mag overhaul guys
(locally) are
dwindling due to old age. It looks like overhauling mags
is a dying art.
Linn


RV6 Flyer wrote:
> S4LN20 and S4LN21 both ran 2,100 hours and were
removed working. I am
> the guy that overhauled both of them before putting
them on my RV-6
> 11 years ago.
>
> Gary A. Sobek
> "My Sanity" RV-6 N157GS O-320 Hartzell,
> 2,159 + Flying Hours So. CA, USA




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