X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from zproxy.gmail.com ([64.233.162.205] verified) by logan.com (CommuniGate Pro SMTP 5.0c3) with ESMTP id 751351 for flyrotary@lancaironline.net; Thu, 06 Oct 2005 00:02:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.162.205; envelope-from=wdleonard@gmail.com Received: by zproxy.gmail.com with SMTP id p8so172370nzb for ; Wed, 05 Oct 2005 21:01:44 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:references; b=ihtTORc4FHo3ohynpDfwFrdTr6CvF1ynh6hrdEiZGrJYPtrYnoysxoi9BLrtFTmG7rRAVDDaQ09ZfZh7CYFQ8qmaVAX2j4hwSD1s6jN9NEY0N+2CUBd/PaR7gwGIG+h//+f9ABpVyfQt+t/aX5wlkRjzU/tNJ9O9VjS3nyJR6hE= Received: by 10.36.12.2 with SMTP id 2mr76476nzl; Wed, 05 Oct 2005 21:01:44 -0700 (PDT) Received: by 10.36.222.6 with HTTP; Wed, 5 Oct 2005 21:01:44 -0700 (PDT) Message-ID: <1c23473f0510052101w6386f163p505691a5ec2b9cee@mail.gmail.com> Date: Wed, 5 Oct 2005 21:01:44 -0700 From: David Leonard Reply-To: David Leonard To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: counterweights In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_10618_25956286.1128571304919" References: ------=_Part_10618_25956286.1128571304919 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On 10/5/05, Russell Duffy <13brv3@bellsouth.net> wrote: > > Rusty, that would be great if you could weigh at least the front counter > weights, rear would be awesome too. That is really a bunch of data that w= e > should have as a group. > Hi Dave, > This won't be as useful as it could be I'm afraid. I believe I took the > known S4 front cw to the hanger, so I don't have it hear to weight. I hav= e > what I believe to be an S3 front cw. It came with the Ebay single rotor > engine, which had S3 housings, and it also has "S3 1.00" stamped on it. > The other cw came with 9.7 rotors, so I "assume" it's an S5. There is no > rear automatic cw in the attic I'm afraid. > In the pics, the S3 is on the left, and the S5 is on the right. Note tha= t > the outer ring of the two are not the same thickness. > S3- 44.9 oz / ring measures 1.05" thick > S5- 42.0 oz / ring measures 0.91" thick > I can check the S4, but I'm not sure when I'll be able to get by the > hanger to grab it. > As Tracy noted, and as I'm sure you're aware, total weight doesn't mean > anything, unless Mazda only changed the outer ring size. As you can see f= rom > the two pics, they changed the shape slightly between the S3 and S5. Perh= aps > there's a visual way to tell the difference, rather than just by weight. > This would probably be something Leon, Lynn, or Bruce could answer. > BTW, do you have your old engine apart now? If so, what did you find? > Good luck, > Rusty (Sonex kit ordered) > > > > Thanks for all the hard work, Rusty. Good info for the group. Though you are right. Not much help in identifying my unidentified rear counter weight= . Since I finally decided on the S5 rotors I can use the S5 front CW that I know I have. My "unknown" rear cw is currently running with my other s5 rotors and the engine is not falling apart, though the vibration level is higher than I expected from a rotary (even noted on the computer analysis when I had my prop balanced). Who thinks it might be a good idea to randomly shave off a little bit of m= y counter weight and see if that makes anything better? :-) -- 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 ------=_Part_10618_25956286.1128571304919 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline

On 10/5/05, = Russell Duffy <13brv3@bellso= uth.net> wrote:
Rusty, that would be great if you could weigh at least = the front counter weights, rear would be awesome too.  That is really = a bunch of data that we should have as a group.
 
 Hi Dave,
 
This won't be as useful a= s it could be I'm afraid.  I believe I took the known S4 front cw= to the hanger, so I don't have it hear to weight.  I have what I= believe to be an S3 front cw.  It came with the Ebay single roto= r engine, which had S3 housings, and it also has "S3=20 1.00" stamped on it.  The other cw came with 9.7 rotors, so I &qu= ot;assume" it's an S5.  There is no rear automatic cw in the= attic I'm afraid.  
 
In the pics, the S3 is on= the left, and the S5 is on the right.  Note that the outer ring = of the two are not the same thickness.  
 
S3- 44.9 oz  / = ring measures 1.05" thick
S5- 42.0 oz  / = ring measures 0.91" thick  
 
I can check the S4, but I= 'm not sure when I'll be able to get by the hanger to grab it. &n= bsp;
 
As Tracy noted, and as I'= m sure you're aware, total weight doesn't mean anything, unless Mazda only = changed the outer ring size.  As you can see from the two pics, they c= hanged the shape slightly between the S3 and S5.  Perhaps there's a&nb= sp;visual way to tell the difference, rather than just by weight.  Thi= s would probably be something Leon, Lynn, or Bruce could answer.  = ;
 
BTW, do you have your old= engine apart now?  If so, what did you find?
 
Good luck,<= /div>
Rusty  (Sonex kit or= dered)



Thanks for all the hard work, Rusty.  Good info for the group.&nb= sp; Though you are right.  Not much help in identifying my unidentifie= d rear counter weight.  Since I finally decided on the S5 rotors I can= use the S5 front CW that I know I have.  My "unknown" rear = cw is currently running with my other s5 rotors and the engine is not = falling apart, though the vibration level is higher than I expected from a = rotary (even noted on the computer analysis when I had my prop balanced).
 
Who thinks it might be a good idea to randomly shave off a little bit = of my counter weight and see if that makes anything better?  :-)

--
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
------=_Part_10618_25956286.1128571304919--