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my welder, tom Phillips, tells me that with both laser and water cut parts that the cut bends ever so slightly when the material exceeds 1/4" thick. I couldn't see it, but he claims he had to touch up my port cutout slightly so the exhaust pipe would slide clear thru the part. My idea of using the cutout slug to help shape the pipe to fit the hole got laughed at, he prefers a piece of bar stock in the vice and a hammer! It took him 2 hours to fit the pipes and finish welding all the pipe joints, which had been simply tacked at this point. I bolted the flanges to a huge piece of channel as a welding jig.
Kevin Lane Portland, OR
e-mail-> n3773@comcast.net
web-> http://home.comcast.net/~n3773
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----- Original Message ----- From: <WRJJRS@aol.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, March 01, 2005 5:09 PM
Subject: [FlyRotary] Re: laser parts
They cost almost the same price as I was getting quoted for raw materials, ($25/each), and knowing how hard stainless is to work with, an easy decision.
Kevin Lane Portland, OR
Kevin, Tell them nice work. The only reason to not go with the cheaper laser cut is if you plan to machine the part after blanking. The laser produces a "crust" on the cut as it's a heat process. The water jet is like a continuous grinding process so it doesn't harden the edge. Since you are just going to weld on a ex pipe the laser is a great choice. Parts look great.
Bill Jepson
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
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