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 access.aic-fl.com ([204.49.76.2] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 868173 for flyrotary@lancaironline.net; Wed, 13 Apr 2005 19:43:54 -0400 Received-SPF: none receiver=logan.com; client-ip=204.49.76.2; envelope-from=unicorn@gdsys.net Received: from b2a7u5 (unverified [204.49.76.42]) by access.aic-fl.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Wed, 13 Apr 2005 18:42:41 -0500 Message-ID: <003b01c54083$7361a640$cbf8fea9@b2a7u5> From: "richard sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fw: Rx-8 Rotors useable in 91 13B? Date: Wed, 13 Apr 2005 18:49:35 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0038_01C54059.89BA92A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 This is a multi-part message in MIME format. ------=_NextPart_000_0038_01C54059.89BA92A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable George,=20 I got the information from my engineering education, and also Leon = confirmed it in one of his recent postings on the subject.=20 One more thing, the difference between the two rotors balancing each = other and needing balance weights anyway, is static balancing vs. = dynamic balancing. Richard Sohn N-2071U=20 ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 13, 2005 5:02 PM Subject: [FlyRotary] Re: Fw: Rx-8 Rotors useable in 91 13B? Richard, This goes against my advice as all components in movement affect the = rotating mass. It would be like not allowing for rings in a piston in the balance = equation. However I will check on that aspect. Where did you obtain that = information George ( down under) From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 13, 2005 12:02 AM Subject: [FlyRotary] Re: Fw: Rx-8 Rotors useable in 91 13B? Bill,=20 If you find out before I do will you let me know about the = additional depth to be cut. On the balancing; I have to cover all that with my one rotor ( no = biggie), I can give you all that stuff a little down the track it will = only require lightening the counter balance weights a little. The e-shaft is the same, the rotors lighter =3D lighter balance = weights. There may be some oil volume difference (read weight) , but I = should have that soon, as well the rotor weight. BTW Tracy's apex seals = are 33 grams ( per rotor) - got them to-day. Has anyone got a set of new Mazda apex seals handy to weigh - I = guess there wouldn't be much in it anyway - just curious! George ( down under)=20 I am going to look into this a bit more and find out how much to = mill a rotor. A lighter rotor =3D> more rpms without increasing stress? Ed Don't forget lighter rotors would require different balance = weights. I have heard from various sources that the Renesis rotor was = lighter and then that they weigh the same! Both from usually reliable = sources, go figure. Bill Jepson George, the apex seals do not go into the balance equation because they = are not attached to the rotor.=20 Just my 2c. Richard Sohn N-2071U ------=_NextPart_000_0038_01C54059.89BA92A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
George,
I got the information from my engineering education, and also Leon=20 confirmed it in one of his recent postings on the subject.
One more thing, the difference between the two rotors balancing = each other=20 and needing balance weights anyway, is static balancing vs. dynamic=20 balancing.
 
Richard Sohn
N-2071U
----- Original Message -----
From:=20 George=20 Lendich
Sent: Wednesday, April 13, 2005 = 5:02=20 PM
Subject: [FlyRotary] Re: Fw: = Rx-8 Rotors=20 useable in 91 13B?

Richard,
This goes against my advice as all components in movement affect = the=20 rotating mass.
It would be like not allowing for rings in a piston in the = balance=20 equation.
However I will check on that aspect. Where did you obtain that=20 information
George ( down under)
From:=20 George Lendich
To: Rotary motors in = aircraft=20
Sent: Wednesday, April 13, = 2005 12:02=20 AM
Subject: [FlyRotary] Re: = Fw: Rx-8=20 Rotors useable in 91 13B?

Bill,
If you find out before I do will you let me know about the = additional=20 depth to be cut.
On the balancing; I have to cover all that with my one rotor = ( no=20 biggie), I can give you all that stuff a little down the track it = will=20 only require lightening the counter balance weights a = little.
 
The e-shaft is the same, the rotors lighter =3D lighter = balance=20 weights.
There may be some oil volume difference (read weight) , = but I=20 should have that soon, as well the rotor weight. BTW Tracy's apex = seals=20 are 33 grams ( per rotor) - got them to-day.
 
Has anyone got a set of new Mazda apex seals handy to weigh - = I guess=20 there wouldn't be much in it anyway - just curious!
 
George ( down under) 
I am = going to look=20 into this a bit more and find out how much to mill a = rotor.  A=20 lighter rotor =3D> more rpms without increasing = stress?
 
Ed Don't forget lighter rotors would require different = balance=20 weights. I have heard from various sources that the Renesis = rotor was=20 lighter and then that they weigh the same! Both from usually = reliable=20 sources, go figure.
Bill Jepson
 
George,
the apex seals do not go into the balance equation because = they are=20 not attached to the rotor.
Just my 2c.
 
Richard Sohn
N-2071U
 
=
 
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