X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from zproxy.gmail.com ([64.233.162.195] verified) by logan.com (CommuniGate Pro SMTP 5.0c4) with ESMTP id 761304 for flyrotary@lancaironline.net; Tue, 11 Oct 2005 03:11:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.162.195; envelope-from=wdleonard@gmail.com Received: by zproxy.gmail.com with SMTP id p8so797755nzb for ; Tue, 11 Oct 2005 00:11:09 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=tGqZftLuiE6KqgpN6MiTcCsWIHK50EP9yYHMJv0FmhVMg1s+N0FO1H6yj0aENlrYc0AVm53Ql/Bpmm5Z/S4foglUoQHDO5gb3ykQXF8OLJ2F/1lOqb9SoHAFklZf1Pr8+6iE58uuiZbgK4kM5B+OU7aAkkAj9i+/E4XiwQFtQk4= Received: by 10.36.56.1 with SMTP id e1mr5399407nza; Tue, 11 Oct 2005 00:11:09 -0700 (PDT) Received: by 10.36.222.6 with HTTP; Tue, 11 Oct 2005 00:11:09 -0700 (PDT) Message-ID: <1c23473f0510110011x6f50ebb1l7d2ff1c7cc9853af@mail.gmail.com> Date: Tue, 11 Oct 2005 00:11:09 -0700 From: David Leonard To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Fwd: Engine Torn down... Drumroll please.... In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_10259_6391703.1129014669375" References: ------=_Part_10259_6391703.1129014669375 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi Rusty, The apex seals in this engine were the stock 3-piece. There were all still in great shape. If it was detonation, then the stock seals held up pretty well. Everything else is undamaged as far as I can tell. At this point, I think I have (by far) the highest time on a turbo aircraf= t rotary - and that is still only 150 hrs. There are a lot of questions I hav= e now... did I do something wrong when I built the last engine? Were some of the parts worn out without me knowing about it? Am I running too rich or with too much continuous boost? Should I do something different with the next engine like break in, different oil, different amount of oil etc.??? The really cool thing is that this re-build is taking a couple weeks (of very part time work) and costing less than $1000. And that includes paying an outrageous price for 9.7 rotors ($300 each - used, uncleaned, worn out looking bearings.) Still there is another RV-6 on the field undergoing a re-build as well (lycoming). The engine has been off the plane for 2 months so far and I am sure he is paying more than $10,000. That plane had only been flying slightly longer than mine. I am also very pleased with the failure mode. I had major failure of compression and breakage of some of the only parts the actually break... an= d I could hardly tell because the engine kept running pretty well. I was stil= l making enough power to outrun a lyc 360 powered rv-8. I ran it for at least 3 hours in that condition. Cool! A am disappointed that I have had so many problems lately (broken ECU, broken RD1-B, broken fuel pump, broken side seals, not to mention the broke= n turbo and previously rusted solid engine.) Sigh... Still, looking forward to the new ported engine with 9.7 rotors.... Wish I could some to the rotary round-up and see how I compare to Tracy, but I have to go practice to go to Iraq. -- Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/_ht_a/vp4skydoc/index.html On 10/10/05, Russell Duffy <13brv3@bellsouth.net> wrote: > > Busted side seals is the short answer. Why is now the question. > Hi Dave, > Well, that certainly explains the pressure you were seeing. Are you usin= g > Tracy/Bruce apex seals? If so, could they be so resistant to damage from > detonation that the side seals are the next to go? That's my only guess, > detonation. > Did the broken seals damage the side housings any, or will everything > else be re-usable? Once again, this goes to show how forgiving the rotary > design is. > Good luck, > Rusty > ------=_Part_10259_6391703.1129014669375 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Hi Rusty,
 
The apex seals in this engine were the stock 3-piece.  There were= all still in great shape.  If it was detonation, then the stock seals= held up pretty well.  Everything else is undamaged as far as I can te= ll.
 
At this point, I think I have (by far) the highest time on a turbo air= craft rotary - and that is still only 150 hrs.  There are a lot of que= stions I have now...  did I do something wrong when I built the last e= ngine?  Were some of the parts worn out without me knowing about it?&n= bsp; Am I running too rich or with too much continuous boost?  Should = I do something different with the next engine like break in, different oil,= different amount of oil etc.???
 
The really cool thing is that this re-build is taking a couple weeks (= of very part time work) and costing less than $1000.  And that include= s paying an outrageous price for 9.7 rotors ($300 each - used, uncleaned, w= orn out looking bearings.)  Still there is another RV-6 on the fi= eld undergoing a re-build as well (lycoming).  The engine has been off= the plane for 2 months so far and I am sure he is paying more than $10,000= .  That plane had only been flying slightly longer than mine.
 
I am also very pleased with the failure mode.   I had major = failure of compression and breakage of some of the only parts the actually = break...  and I could hardly tell because the engine kept running pret= ty well.  I was still making enough power to outrun a lyc 360 pow= ered rv-8.  I ran it for at least 3 hours in that condition.  Coo= l!
 
A am disappointed that I have had so many problems lately (broken ECU,= broken RD1-B, broken fuel pump, broken side seals, not to mention the brok= en turbo and previously rusted solid engine.) Sigh... 
 
Still, looking forward to the new ported engine with 9.7 rotors....
 
Wish I could some to the rotary round-up and see how I compare to Trac= y, but I have to go practice to go to Iraq.
--
Dave Leonard
Turbo= Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a= /vp4skydoc/index.html
 
On 10/10/05, Russell Duffy <13brv3@bells= outh.net> wrote:
Busted side seals is the short answer.  Why is now the question.&= nbsp;  
 
Hi Dave,
 
Well, that certainly expl= ains the pressure you were seeing.  Are you using Tracy/Bruce apex sea= ls?  If so, could they be so resistant to damage from detonation that = the side seals are the next to go?  That's my only guess, detonat= ion.  
 
Did the broken seals= damage the side housings any, or will everything else be re-usable?&n= bsp; Once a= gain, this goes to show how forgiving the rotary design is.  = ;  
 
Good luck,<= /div>
Rusty
 



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