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Rotax 912 exhaust pipe cracks

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avkozloff(at)roadrunner.c
Guest

Posted: Sun Mar 20, 2011 9:31 am Post subject: Rotax 912 exhaust pipe cracks

Gentlemen:	

	A few years ago there was a spate of Pulsar II and III exhaust pipe  

cracks that was somehow resolved.

	I remember some discussion regarding replacing the mild steel pipes that  

came with the engine with Stainless Steel ones.

	Could anyone please refresh our minds with the the details of this  

problem and how it was resolved?



	Thank you,



-- 

Alex Kozloff

Pulsar I

N190AK

pulsar331(at)sbcglobal.ne
Guest

Posted: Sun Mar 20, 2011 10:08 am Post subject: Rotax 912 exhaust pipe cracks

It was resolved by going to Rick's exhaust system.  Both the original mild steel and the SkyStar stainless steel systems cracked continuously.  

  

 I have Rick's system built with stainless steel and it has worked perfectly for over 800 hours.  I believe those with his mild steel system have also had success.

  

 I think some folks also had success with a stainless steel system made by Jeff Sell.

  

 Hope that helps.

  

 Bill Coleman

 Pulsar XP N331BP



 

   From: Alex Kozloff <avkozloff(at)roadrunner.com>

To: pulsar-list(at)matronics.com

Sent: Sun, March 20, 2011 1:15:00 PM

Subject: Rotax 912 exhaust pipe cracks



--> Pulsar-List message posted by: "Alex Kozloff" <avkozloff(at)roadrunner.com (avkozloff(at)roadrunner.com)>



Gentlemen:    

    A few years ago there was a spate of Pulsar II and III exhaust pipe cracks that was somehow resolved.

    I remember some discussion regarding replacing the mild steel pipes that came with the engine with Stainless Steel ones.

    Could anyone please refresh our minds with the the details of this problem and how it was  resolved?



    Thank you,



--Alex Kozloff

Pu  nbsp;                    ================

 [quote][b]

mortweaver(at)sbcglobal.n
Guest

Posted: Sun Mar 20, 2011 11:13 am Post subject: Rotax 912 exhaust pipe cracks

I had similar cracking problems with Aero Designs mild steel and Sky Star's stainless steel systems on my Pulsar XP.  I decided to go for maximum efficiency by reducing exhaust system weight and heat dissipating area in the engine compartment.  I had Aircraft Exhaust, Inc. build a straight pipe system from a PVC pipe mock-up.  There is no exhaust cans in my system.  The exhaust pipes exiting the lower cowl are capped on the ends with a series evenly spaced 3/16 holes around the periphery of each pipe.  What I have done is to move the exhaust can baffle outside of the engine compartment less the can.  I monitored both cylinder EGT and back pressure to experimentally determine how many holes to make.  I used a long tapered punch to pull flutes in the stainless steel.  The result was 3.1 pounds weight per side with  slightly increased exhaust noise.  I have short transverse pipe runs (about 3 inches from bottom of fuselage) and no measurable increase in drag.  I also have no exhaust stains on the bottom of the fuselage.  I have less than 100 hours on the system with no signs of cracking or loosening at the manifold connection points.  I can provide pictures if needed.

 Dave Weaver N912GR



--- On Sun, 3/20/11, Alex Kozloff <avkozloff(at)roadrunner.com> wrote:



  	  Quote: 	
		  

From: Alex Kozloff <avkozloff(at)roadrunner.com>

Subject: Rotax 912 exhaust pipe cracks

To: pulsar-list(at)matronics.com

Date: Sunday, March 20, 2011, 12:15 PM



 --> Pulsar-List message posted by: "Alex Kozloff" <avkozloff(at)roadrunner.com (avkozloff(at)roadrunner.com)>



Gentlemen:    

    A few years ago there was a spate of Pulsar II and III exhaust pipe cracks that was somehow resolved.

    I remember some discussion regarding replacing the mild steel pipes that came with the engine with Stainless Steel ones.

    Could anyone please refresh our minds with the the details of this problem and how it was resolved?



    Thank you,



--Alex Kozloff

Pulsar I

N190AKhttp://www.matronics.com/Navigator?P              - MATRONICS WEB FORUM;             ="http://www.matronics.com/contribution" target=_blank>http://www.matro=====================





	
 [quote][b]

rickyd54(at)gmail.com
Guest

Posted: Sun Mar 20, 2011 1:03 pm Post subject: Rotax 912 exhaust pipe cracks

Alex,

Did you get a new bird?

Rick (AKA your Seagrams buddy:-)



On Mar 20, 2011, at 12:15 PM, "Alex Kozloff" <avkozloff(at)roadrunner.com> wrote:



 	  Quote: 	
		   

 

 Gentlemen:    

    A few years ago there was a spate of Pulsar II and III exhaust pipe cracks that was somehow resolved.

    I remember some discussion regarding replacing the mild steel pipes that came with the engine with Stainless Steel ones.

    Could anyone please refresh our minds with the the details of this problem and how it was resolved?

 

    Thank you,

 

 -- 

 Alex Kozloff

 Pulsar I

 N190AK

skipper144(at)juno.com
Guest

Posted: Sun Mar 20, 2011 1:14 pm Post subject: Rotax 912 exhaust pipe cracks

Dave

Thanks for the exhaust  pipe description.

Pictures would be terrific!

Thanks in advance.

Be well,

Skip La Police

ccoulter(at)wavecable.com
Guest

Posted: Mon Mar 21, 2011 7:21 am Post subject: Rotax 912 exhaust pipe cracks

On Sun, 20 Mar 2011 10:15:00 -0700

  "Alex Kozloff" <avkozloff(at)roadrunner.com> wrote:

 	  Quote: 	
		   

<avkozloff(at)roadrunner.com>

 

 Gentlemen:	

 	A few years ago there was a spate of Pulsar II and III 

exhaust pipe  cracks that was somehow resolved.

 	I remember some discussion regarding replacing the mild 

steel pipes that  came with the engine with Stainless 

Steel ones.

 	Could anyone please refresh our minds with the the 

details of this  problem and how it was resolved?

 

 	Thank you,

 

 -- 

 Alex Kozloff

 Pulsar I

 N190AK

 

Un/Subscription,

Forums!

Admin.

 We bought Rick's exhaust.


	


Clarke

 	  Quote:

garymid(at)ymail.com
Guest

Posted: Mon Mar 21, 2011 7:51 am Post subject: Rotax 912 exhaust pipe cracks

I have Rick's exhaust- 760hrs with zero issues.

  

 Gary

 Pulsar XP-912  N9DK



 

   From: Coleman <pulsar331(at)sbcglobal.net>

To: pulsar-list(at)matronics.com

Sent: Sun, March 20, 2011 2:05:45 PM

Subject: Re: Rotax 912 exhaust pipe cracks



   It was resolved by going to Rick's exhaust system.  Both the original mild steel and the SkyStar stainless steel systems cracked continuously.  

  

 I have Rick's system built with stainless steel and it has worked perfectly for over 800 hours.  I believe those with his mild steel system have also had success.

  

 I think some folks also had success with a stainless steel system made by Jeff Sell.

  

 Hope that helps.

  

 Bill Coleman

 Pulsar XP N331BP



 

   From: Alex Kozloff <avkozloff(at)roadrunner.com>

To: pulsar-list(at)matronics.com

Sent: Sun, March 20, 2011 1:15:00 PM

Subject: Rotax 912 exhaust pipe cracks



--> Pulsar-List message posted by: "Alex Kozloff" <avkozloff(at)roadrunner.com (avkozloff(at)roadrunner.com)>



Gentlemen:    

    A few years ago there was a spate of Pulsar II and III exhaust pipe cracks that was somehow resolved.

    I remember some discussion regarding replacing the mild steel pipes that came with the engine with Stainless Steel ones.

    Could anyone please refresh our minds with the the details of  this problem and how it was resolved?



    Thank you,



--Alex Kozloff

Pu  nbsp;                    ================

 	  Quote: 	
		  [b] 	
 



               [quote][b]

TomisFlyingby(at)comcast.
Guest

Posted: Thu Mar 24, 2011 7:26 pm Post subject: Rotax 912 exhaust pipe cracks

Rick's our hero!!

 [quote]   ---

ccoulter(at)wavecable.com
Guest

Posted: Fri Mar 25, 2011 10:13 am Post subject: Rotax 912 exhaust pipe cracks

On Thu, 24 Mar 2011 22:24:38 -0500

  "Tom Gibbons" <TomisFlyingby(at)comcast.net> wrote:

[quote] Rick's our hero!!

  ---

freedom4life(at)xtra.co.n
Guest

Posted: Fri Mar 25, 2011 11:00 am Post subject: Rotax 912 exhaust pipe cracks

I have a look alike product based on Rick's system and I now have 1500 hours 

on it with no issues.  My first system supplied by Aero Designs would crack 

every 50 hours or so!  It got to the point I was afraid to fly anywhere in 

case it broke.

Cliff

ZK KFC

[quote] 

 On Thu, 24 Mar 2011 22:24:38 -0500

  "Tom Gibbons" <TomisFlyingby(at)comcast.net> wrote:

> Rick's our hero!!

>  ---

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