X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [201.225.225.168] (HELO cwpanama.net) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1008723 for flyrotary@lancaironline.net; Tue, 21 Jun 2005 09:10:48 -0400 Received-SPF: none receiver=logan.com; client-ip=201.225.225.168; envelope-from=rijakits@cwpanama.net Received: from [201.224.93.110] (HELO usuarioq3efog0) by frontend2.cwpanama.net (CommuniGate Pro SMTP 4.2.10) with SMTP id 43190115 for flyrotary@lancaironline.net; Tue, 21 Jun 2005 08:13:22 -0500 Message-ID: <015301c57662$6cd6b490$6e5de0c9@usuarioq3efog0> From: "rijakits" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Apex Seals & Balancing was Re: [FlyRotary] Re: Weights Date: Tue, 21 Jun 2005 08:09:14 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_014F_01C57638.83B46150" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_014F_01C57638.83B46150 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Thanks, Leon! Thomas J. ----- Original Message ----- From: Leon To: Rotary motors in aircraft Sent: Monday, June 20, 2005 4:19 PM Subject: [FlyRotary] Apex Seals & Balancing was Re: [FlyRotary] Re: Weights Hi Thomas, Richard Sohn is on the case. He already posted the answer. The apex seals and springs are suported by the trochoid at all times, and don't act on the eccentric shaft assy. The whole trick to getting the balance right is the oil mass allowance. Cheers, Leon ----- Original Message ----- From: rijakits To: Rotary motors in aircraft Sent: Tuesday, June 21, 2005 4:04 AM Subject: [FlyRotary] Re: Weights Quich question to balancing: Though your list is not specifically pointed to balancing. For a dynamic balance job DO YOU or DO YOU NOT include the weight of the apex-seals? Apparently they should not bear on the rotor/excenter of the shaft, as the rotorhousing carries their weight at all times. Am I missing something? Leon? Thomas J. ----- Original Message ----- From: George Lendich To: Rotary motors in aircraft Sent: Monday, June 20, 2005 6:18 AM Subject: [FlyRotary] Weights Rusty, Here's some very accurate weights for your records- Apex corner seals x6 = 19grams Apex corner seal springs x 6 = 1 gram Side seal springs x6 =1 gram Side seals x6 = 25grams Oil seal springs x4 = 10 grams Oil seal retainers( metal) x4 = 92 grams Oil 'O' rings x4 = 16 grams Total of 164 grams ( 5.784936 oz) Weighed all together 164 grams ( as a check for accuracy) RX8 Rotor 9.3346lbs( 4243 grams) I just can't see how you get 10 lb 9 oz rotor weight comparing these weights, even though the RX7 rotors are a tad heavier! BTW Tracy's apex seals are 30 grams. George ( down under) ------=_NextPart_000_014F_01C57638.83B46150 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Leon!
 
Thomas J.
----- Original Message -----
From:=20 Leon
Sent: Monday, June 20, 2005 = 4:19 PM
Subject: [FlyRotary] Apex Seals = &=20 Balancing was Re: [FlyRotary] Re: Weights

Hi Thomas,
 
Richard Sohn is on the case.  He = already=20 posted the answer.  The apex seals and springs are suported = by the=20 trochoid at all times,  and don't act on the eccentric shaft = assy. =20 The whole trick to getting the balance right is the oil = mass allowance.=20
 
Cheers,
 
Leon
----- Original Message -----
From:=20 rijakits
To: Rotary motors in = aircraft=20
Sent: Tuesday, June 21, 2005 = 4:04=20 AM
Subject: [FlyRotary] Re: = Weights

Quich question to balancing:
 
Though your list is not specifically pointed = to=20 balancing.
For a dynamic balance job DO YOU  or DO = YOU NOT=20 include the weight of the apex-seals?
Apparently they should not bear on the = rotor/excenter=20 of the shaft, as the rotorhousing carries their weight at all=20 times.
 
Am I missing something?
 
Leon?
 
Thomas J.
----- Original Message ----- =
From:=20 George Lendich
To: Rotary motors in = aircraft=20
Sent: Monday, June 20, 2005 = 6:18=20 AM
Subject: [FlyRotary] = Weights

Rusty,
Here's some very accurate weights = for your=20 records-
Apex corner seals x6 =3D = 19grams
Apex corner seal springs x = 6 =3D 1=20 gram
Side seal springs x6 =3D1 = gram
Side seals x6 =3D = 25grams
Oil seal springs x4 =3D 10 = grams
Oil seal retainers( = metal) x4 =3D 92=20 grams
Oil 'O' rings x4 =3D 16 = grams
 
Total of 164 grams ( 5.784936=20 oz)
 
Weighed all together 164 grams ( = as a check=20 for accuracy)
 
RX8 Rotor 9.3346lbs( 4243 = grams)
 
I just can't see how you get 10 = lb 9 oz rotor=20 weight comparing these weights, even though the RX7 rotors = are a tad=20 heavier!
 
BTW Tracy's apex seals are 30=20 grams.
George ( down=20 = under)
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