webra 160 - meticulously clean

[Keith Black]

Karl Mueller told me an interesting way to change the position (height or side to side) of a header without bending the header itself. Sand the flange to change the angle that the header 
mounts up against the exhaust stack of the engine.

I was able to use this approach to raise the output end of a header by about 3/8" to clear my landing gear. 

Keith Black


  ----- Original Message ----- 
  From: Jim_Woodward at beaerospace.com 
  To: discussion at nsrca.org 
  Sent: Tuesday, October 19, 2004 9:40 AM
  Subject: RE: webra 160 - meticulously clean



  Hi Tony, 

  I hope you are doing well in Phoenix.  I purchased and used the Johnson header that Central sells and used it at the 23.5" dimension.  The engine ran perfectly on the ground, but did not idle down in flight, or for landing, like the 160 I have on the MACs setup (24.25" to first baffle).  This header broke within less than 10 flights.  The pipe portion broke cleanly off around the weld joint.  In a bind (right before the Apopka contest), I went to a marine store and had them re-weld the header.  After the repair, the header broke again (6 or so flights), but this time about 1.0" above the weld. I then ordered the MACs header as I have used previously on 1.45s and one 160.  Central hobbies was very gracious and replaced the Johnson header with a Hatori steel header, which at this point I have not used.  The Hatori is shorter than the Johnson header.   

  Then, the old and much used MACs header I had on the Lazuite broke!  Good thing I ordered two MACs headers.  At this point each MACs header has been working fine.  Jim Ivey, Ken B., and I bent one of the MACs headers the night before the Apopka contest in the hotel room by blocking the header in certain positions and using a hammer ting it in place.  Actually, it doesn't look that bad, fits perfectly, and definitely beats trying to use a torch to heat up the header and then bend somehow (which we tried at first). 

  Thanks, 
  Jim W.




       "Tony Quist" <quist23 at cox.net> 
        Sent by: discussion-request at nsrca.org 
        10/19/2004 10:21 AM 
        Please respond to discussion 

               
                To:        <discussion at nsrca.org> 
                cc:         
                Subject:        RE: webra 160 - meticulously clean 



  Jim, 
   

  Are you running the Johnson header that Central Hobbies sells?  If so what length are you running it.  I saw that Matt K was running 24 inches to the first baffle.  My header at full length only gives me 23.5 inches. 

   

  I have test run the engine and there are leaks where you say.  I will rtv the areas and put hose clamps on the coupler. 

   

  Tony Quist 

   

  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of Jim_Woodward at beaerospace.com
  Sent: Tuesday, October 19, 2004 7:09 AM
  To: discussion at nsrca.org
  Subject: RE: webra 160 - meticulously clean 

   


  I installed one headshim in the two Webra 160 (Aggressor and Lazulite).  I did not notice any difference in running, nor a compression reduction.   

  Also, I've gotten mine to be meticulously clean while running.  After a day's flying, there is almost no need to clean the plane.  Simple, but with some routine checks here are the steps: 
  1.  Use RTV between the header and engine (check or redue once a month if residue develops on plane) 
  2.  Ensure all bolts are tight (no lie) (engine will still run with loose headbolt) 
  3.  Header & Pipe coupler:  I found zip ties to not adequately seal the silicone coupler.  For instance, if you examine the plane and there is exhuast residue on the plane before the stinger, then you have a leak somewhere.  After installing small hose clamps, and checking every so often, there is no "exhaust" residue before the actual exhaust stinger. 
  4. Pinch or disconnect fuel line:   If you pinch the fuel line in between flights, or just plug the line, there will be little to few fuel drops exiting the carburetor while the plane is sitting.   
  5.  Run exhaust stinger extension: 

  Thanks, 
  Jim W.




           "Joe Lachowski" <jlachow at hotmail.com> 
        Sent by: discussion-request at nsrca.org 
        10/19/2004 09:52 AM 
        Please respond to discussion 
               
               To:        discussion at nsrca.org 
               cc:         
               Subject:        RE: webra 160 





  Motor does not come with head shim. Got 3 motors that way. I haven't had a 
  need to use them either.

  >From: "George Kolotouros" <georgeman4 at cox.net>
  >Reply-To: discussion at nsrca.org
  >To: <discussion at nsrca.org>
  >CC: "George Kolotouros" <georgeman4 at cox.net>
  >Subject: webra 160
  >Date: Mon, 18 Oct 2004 18:54:56 -0700
  >
  >Hello everyone, been having some problems with my new webra. I finally have 
  >the proper length on my es 160 pipe. 24in from plug to first
  >baffle. played with the mixture. Put it in the air. High speed is lean
  >richened it a few % on my radio. Later when I got home I decided to pull 
  >the head to look at the top of the piston. Looks fine, found out I dont 
  >have a head gasket. There parts breakdown shows that ther is one. What 
  >gives? George Kolotouros

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