X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: (direct reply)\eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from mail09.syd.optusnet.com.au ([211.29.132.190] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTPS id 871553 for flyrotary@lancaironline.net; Fri, 15 Apr 2005 22:02:57 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.190; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-220-91.dsl.nsw.optusnet.com.au [220.236.220.91]) by mail09.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3G226o8012412 for ; Sat, 16 Apr 2005 12:02:07 +1000 Message-ID: <001501c54228$cfbafb70$5bdcecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: V shape Apex Seal Slots? Date: Sat, 16 Apr 2005 12:05:49 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 > << Lynn, > Good info on balancing the two rotors. > Does the rotor have to balanced within itself for a best balancing outcome. > I'm doing a 'single rotor' and was wondering if I need to go that far. > George ( down under) > >> > > The rotors are balanced dynamically (spin balanced) from the factory and then > hand selected into sets that weigh the same within a few grams. Notice some > balance marks on all but one corner (generally). Lynn, I noticed this mentioned on other sites, but the RX8 rotors have NO balancing marks ( read no drill or mill marks) on the sides of the apexes. Perhaps, because of the better manufacturing process they are inherently better balanced. OR because the depressions ( and exhaust edges) are machined the balancing is done within the same process. It's something I guess I will have to check. George (down under)