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Slick mags/bendix mags

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Charles Heathco

Joined: 10 Jan 2006
Posts: 201

Posted: Mon Sep 01, 2008 5:29 am Post subject: Slick mags/bendix mags

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
Guest

Posted: Mon Sep 01, 2008 5:30 pm Post subject: Slick mags/bendix mags

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
Guest

Posted: Tue Sep 02, 2008 6:32 pm Post subject: Slick mags/bendix mags

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

Posted: Tue Sep 02, 2008 7:16 pm Post subject: Slick mags/bendix mags

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
Guest

Posted: Tue Sep 02, 2008 8:17 pm Post subject: Slick mags/bendix mags

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.
Guest

Posted: Wed Sep 03, 2008 4:55 am Post subject: Slick mags/bendix mags

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

Posted: Thu Sep 04, 2008 11:47 am Post subject: Slick mags/bendix mags

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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