X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-3.exch003intermedia.net ([207.5.74.110] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5063857 for flyrotary@lancaironline.net; Tue, 26 Jul 2011 10:57:57 -0400 Received-SPF: none receiver=logan.com; client-ip=207.5.74.110; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-3.exch003intermedia.net ([207.5.74.110]) with mapi; Tue, 26 Jul 2011 07:57:21 -0700 From: Jeff Whaley To: 'Rotary motors in aircraft' Date: Tue, 26 Jul 2011 07:58:27 -0700 Subject: RE:Quiet Thread-Topic: RE:Quiet Thread-Index: AcxLpHma6KkGo8j9SmSST4ESQsCi0Q== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E019EE5F9514AEXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E019EE5F9514AEXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Yes, it has been a bit quiet and I too have been silent for a while. Just recently went through a rebuild of my 13B due to low compression ... p= rior to that you may remember that a tension bolt broke and was extracted/r= eplaced. During disassembly of my engine I found one set of APEX springs flattened, = another broken tension bolt and one corner seal broken at the narrow point. Engine was overhauled with new o-rings from RWS; original APEX seals reinst= alled - but all APEX spring sets were replaced with OEM Mazda parts. I bought and installed a set of solid corner seals from ATKINS. All the tension bolts were upgraded to the S5 series heavier style. The '88-S4-9.4:1 compression rotors were replaced with a pair of '91-S5-9.7= :1 rotors. The oil-out port was moved from the front cover to the front housing, after= drilling through to the oil gallery and tapping for a connector - this rem= oves two 90 degree turns. The PSRU oil-return port was moved from the front cover to the bottom of th= e rear rotor housing, after drilling through and adding a connector. To date only 2 hours on the rebuilt engine ... it is making a bit more powe= r - indicated by a richer mixture requirement for best power. Jeff Whaley This message, and the documents attached hereto, is intended only for the a= ddressee and may contain privileged or confidential information. Any unauth= orized disclosure is strictly prohibited. If you have received this message= in error, please notify us immediately so that we may correct our internal= records. Please then delete the original message. Thank you. --_000_C03ABB0A7362B84BB53D544B3C305E0E019EE5F9514AEXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Yes, it has been a bit quiet and I too have been sil= ent for a while.

Just recently went through a rebuild of my 13B due t= o low compression … prior to that you may remember that a tension bol= t broke and was extracted/replaced.

During disassembly of my engine I found one set of A= PEX springs flattened, another broken tension bolt and one corner seal brok= en at the narrow point.

 

Engine was overhauled with new o-rings from RWS; ori= ginal APEX seals reinstalled – but all APEX spring sets were replaced= with OEM Mazda parts.

I bought and installed a set of solid corner seals f= rom ATKINS.

All the tension bolts were upgraded to the S5 series= heavier style.

The ’88-S4-9.4:1 compression rotors were repla= ced with a pair of ’91-S5-9.7:1 rotors.

The oil-out port was moved from the front cover to t= he front housing, after drilling through to the oil gallery and tapping for= a connector – this removes two 90 degree turns.

The PSRU oil-return port was moved from the front co= ver to the bottom of the rear rotor housing, after drilling through and add= ing a connector.

 

To date only 2 hours on the rebuilt engine … i= t is making a bit more power – indicated by a richer mixture requirem= ent for best power.

 

Jeff Whaley

 


This message, and the docum= ents attached hereto, is intended only for the addressee and may contain pr= ivileged or confidential information. Any unauthorized disclosure is strict= ly prohibited. If you have received this message in error, please notify us immediately so that we may correct our = internal records. Please then delete the original message. Thank you.
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