Mailing List flyrotary@lancaironline.net Message #20538
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: New Rotors!
Date: Wed, 20 Apr 2005 08:59:32 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Yes, Indeed!  Started putting the rotor pieces together last night, the used side seals all give very good tolerances.  I had to change some from the slots they were in on the old rotors, but juggling them around I could match the seal length to the slot quite well.  Glad I could as you have to trim the stock side seals for your fit - a tedious task at best.
 
I was a bit dismayed to find that the tolerance on my oil control rings wear were at or outside of specs after only 150 hours.  Again, this could be accelerated wear due to ingesting  the dust around my hangar.  So had to order some more.   A filter will be next on the list.
 
Interestingly in the basic kit you get through Tracy, they provide a length of rubber channel tube that you cut your corner seal rubber plugs out of.
 
----- Original Message -----
Sent: Wednesday, April 20, 2005 7:48 AM
Subject: [FlyRotary] Re: New Rotors!

Ed,
Sounds like the fun is ready to begin.
 
Steve Brooks
 
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson
Sent: Tuesday, April 19, 2005 11:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] New Rotors!

Got the new rotors today - first time I've ever seen a new rotor - the are bright metallic {:>). 
 
The depth of the apex seal slot on the new rotors ranged from 9.65mm to 9.77 mm.  Interestingly the width of the bottom of the apex slot was 1.88mm but the top was narrower at 1.778mm.  I noticed that the lip of the apex seal slot had a tiny burr of metal along it as if they were not using a sharp enough tool or else pushing it along too fast.  Or perhaps no one took the time to deburr the slot.
 
Just in case any of you ever wonder whether you are looking at a 9.7:1 rotor or some other rotor, there is a fairly easy way to tell.  Lay a straight edge across the depression in the rotor and measure from its bottom to the center of the depression, it should measure right at 4 mm.  The 9.1 measure around 7mm for comparison.  Just thought you might want to know.
 
Ed
 
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
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