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 5064056 for flyrotary@lancaironline.net; Tue, 26 Jul 2011 14:10:35 -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 11:10:01 -0700 From: Jeff Whaley To: 'Rotary motors in aircraft' Date: Tue, 26 Jul 2011 11:11:07 -0700 Subject: RE:Quiet Thread-Topic: Quiet Thread-Index: AcxLpHma6KkGo8j9SmSST4ESQsCi0QAGJxUw Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/related; boundary="_005_C03ABB0A7362B84BB53D544B3C305E0E019EE5F95309EXVMBX0035e_"; type="multipart/alternative" MIME-Version: 1.0 --_005_C03ABB0A7362B84BB53D544B3C305E0E019EE5F95309EXVMBX0035e_ Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E019EE5F95309EXVMBX0035e_" --_000_C03ABB0A7362B84BB53D544B3C305E0E019EE5F95309EXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Good questions Tracy ... and the answer to both is yes, we could not see an= ything wrong with the APEX seals; why one spring set was flattened is still= a mystery, so is the broken corner seal but luckily it stayed in place and= caused no further damage. I contribute the broken tension bolt to a combi= nation of over-torqued and perhaps too little anti-vibration RTV. Fortunately my friend Cary's bone pile had a set of counter weights. Jeff From: Tracy Subject: Re: [FlyRotary] Re: Quiet Date: Tue, 26 Jul 2011 12:12:26 -0400 To: Rotary motors in aircraft [cid:image001.gif@01CC4B9B.FC1E73D0] [cid:image002.gif@01CC4B9B.FC1E73D0] Couple of questions on the overhaul Jeff. As you may recall from Chris Barber's experience, if the springs were frie= d, the apex seals were probably fried as well. Did you check for a sag in = the middle of the apex seal on the fried spring side? You probably handled this but for builders that don't know, Did you change both counterweights when you changed the rotors from series = 4 to series 5? Tracy Sent from my iPad From: Jeff Whaley Sent: Tuesday, July 26, 2011 10:58 AM To: 'Rotary motors in aircraft' Subject: RE:Quiet 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_C03ABB0A7362B84BB53D544B3C305E0E019EE5F95309EXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Good questions Tracy &= #8230; and the answer to both is yes, we could not see anything wrong with = the APEX seals; why one spring set was flattened is still a mystery, so is = the broken corner seal but luckily it stayed in place and caused no further damage.  I contribute the broken tensi= on bolt to a combination of over-torqued and perhaps too little anti-vibrat= ion RTV.

Fortunately my friend = Cary’s bone pile had a set of counter weights.

Jeff=

 

From:

Tracy <rwstracy@gmail.com>

Subject:

Re: [FlyRotary] Re: Quiet

Date:

Tue, 26 Jul 2011 12:12:26 -0400

To:

Rotary motors in aircraft <flyrotary@= lancaironline.net>

3D"Message

3D"Undecoded

Couple of questions on the overhaul Jeff= .  

 

As you may recall from Chris Barber's ex= perience,  if the springs were fried, the apex seals were probably fri= ed as well.  Did you check for a sag in the middle of the apex seal on the fried spring side?  

 

You probably handled this but for builde= rs that don't know,

Did you change both counterweights when = you changed the rotors from series 4 to series 5?  <= /p>

 

Tracy

Sent from my iPad

 

 

 

From: Jeff Wha= ley
Sent: Tuesday, July 26, 2011 10:58 AM
To: 'Rotary motors in aircraft'
Subject: RE:Quiet

 

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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