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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-912152@logan.com>
Subject: Re: [FlyRotary] Rotors
Date: Sun, 24 Apr 2005 08:40:50 +1000
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Jim,
Another very good idea, and did think of that myself. The slot is a little
restrictive and may require a experienced Tig welder to do the job - without
flaws. A local chap used to Tig weld tips on Turbine blades, so he would be
good for this application - however with welding and then regrooving the
costs are getting up there.
I believe the cheapest you would get the slots recut would be about $50 a
slot ( remembering this is precision work) - that's
$300 for two rotors and then their's the welding costs.
You do the numbers.
George (down under)

> Hey all you smart guys.  Why can't the apex groves just be welded up and a
new groove cut?  Welds are supposed to be as strong
> as the base metal or stronger.  It is not a "new" technology.  EDM
machining has been recommended to cut the grooves to 3 mm so
> what am I missing?  Is there a better way to do it?  Cheaper alternative?
Cast our own rotors?  Tell me more.  Talent and ideas are
> not in short supply on this list.
>
> Jim Brewer
> Albemarle, NC
>
>
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>
>