X-Virus-Scanned: clean according to Sophos on Logan.com From: "David Leonard" Received: from mail-qa0-f44.google.com ([209.85.216.44] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 7154061 for flyrotary@lancaironline.net; Thu, 18 Sep 2014 18:37:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.44; envelope-from=wdleonard@gmail.com Received: by mail-qa0-f44.google.com with SMTP id w8so1901170qac.31 for ; Thu, 18 Sep 2014 15:36:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=YqPzbEiom36y0pgs5dmDzkdd++4prWzcNACr68b0bcY=; b=TY2vxaBcPj+Ami1EiiWcT+zPL+cYvQJGqc5uiY+a6pgnB/8/P+Oq1zg8cDBu5XA2kE lyC6mnavW1WuAepCGNqv14U3k9T9/tGQ9unt9XsV5dIVwpcAsZWfRm4aUwHX1JM3IFJP 9EwdqxvE4+AdiXAlqgZkCdU57LiYL/13nFCARowlNtelgbGNvaHHC3Td6NfVxBLIhbP/ qDERHa3I2Z2RxOM8IdYB3m3vhlfEOKy/oFsowjjmFRsO2S9L/I9AfsHjGDB2C9EY5vSD tWl6lzpsNavFqMc7VdYK452QA+sjubH+kIfk5jiRayuZ8lwHv5oEd5ZYNF4bzglSsqEY qjhQ== MIME-Version: 1.0 X-Received: by 10.224.23.131 with SMTP id r3mr10944113qab.90.1411079785008; Thu, 18 Sep 2014 15:36:25 -0700 (PDT) Received: by 10.140.102.42 with HTTP; Thu, 18 Sep 2014 15:36:24 -0700 (PDT) In-Reply-To: References: Date: Thu, 18 Sep 2014 15:36:24 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Eggie 3rd Generation PSRU failure again, etc. To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a11c2c5c25679a305035e9d54 --001a11c2c5c25679a305035e9d54 Content-Type: text/plain; charset=UTF-8 Great input Tracy! Thanks, that is reassuring. Heading out now to get my FAA approved aircraft chain lube :-) Dave Leonard On Wed, Sep 17, 2014 at 8:00 AM, Tracy wrote: > Most spline failures occur for one of 4 reasons. > > 1. Misalignment, either axially or radially. > 2. Excessive clearance, allowing torsional vibrations to accelerate > wear. > 3. Inadequate shaft size for the application. > 4. Mismatch of involute spline pressure angle > > The input shaft on the RD1 drive was the biggest PITA to fabricate due to > the need to address theses factors. Have never seen a problem on RDx input > splines (lubricated or not) but greasing the spline is a good idea if for > no other reason than to prevent rust. There really should be almost no > wearing friction in a properly designed splined shaft. > > Having said that, I always felt good about the ability to visually inspect > the input shaft spline on the RD1 drives. I like to use "Chain Wax" > (aerosol spray made for lubricating motorcycle chains) for things like > this. Spray it on anything you want to protect from rust or corrosion. > > Tracy > Sent from my iPad > > On Sep 17, 2014, at 8:24, "hoursaway1" > wrote: > > As a Cadillac tech for 25 years, I saw this same type of failure of the > 6L50 trans output shaft to transfer case input shaft in CTS, STS & SRX all > wheel drive cars starting in 2006 or 2007 with verying miles ( > 20,000--60,000 ). The two came together, unlubed & open to the atmosphere, > Michigan, moisture, oxygen, corrosion, failure. My wife wanted a 2008 > SRX in 2009 so the first thing I did was onto the hoist it goes & Zep 2000 > spray grease ( this sprays out very thin & fluid like then firms up & does > not dry out, highly recommend ) into the top opening until poured out the > bottom, 0-prob. for 90,000 miles then sold. Watch for the telltale signs > of THE DUST. How you doing Doug. David R. Cook RV6A Rotary. > > ------------------------------ > *From: *"Fly rotary blog, e-mail" > *To: *"Fly rotary blog, e-mail" > *Sent: *Wednesday, September 17, 2014 6:36:48 AM > *Subject: *[FlyRotary] Eggie 3rd Generation PSRU failure again, etc. > > One would have naturally thought that a "3rd Generation" PSRU would be > the "cat's meow"; but that evidently isn't the case, and it almost cost a > pilot and pax in an RV-9A their lives! The below report (see link) also > states that there have been quite a few failures of this PSRU, and one came > after only 160 hrs of usage! Amazing the "snake oil" that is out there and > ready to hurt people... > > > http://www.ntsb.gov/aviationquery/brief2.aspx?ev_id=20140224X15602&ntsbno=ERA14LA130&akey=1 > > > I hope to get after the 13B FWF on my RV-9A this winter and have it ready > for an engine run in Feb or March when it warms up a bit. This FWF package > is the one that I bought from Tommy James back in 2005 or 6 (has it been > that long ago?), and he flew it for 60 hrs or so in his Glastar. It is > really time to get it finished up I think! > > Fly safe out there! > > Doug Lomheim > RV-3A restored and flying > RV-9A moving to the top of the "to do" list again! :) > > > > > > --001a11c2c5c25679a305035e9d54 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Great input Tracy! =C2=A0Thanks, that is reassuring. =C2= =A0Heading out now to get my FAA approved aircraft chain lube =C2=A0:-)
Dave Leonard

On Wed, Sep 17, 2014 at 8:00 AM, Tracy <f= lyrotary@lancaironline.net> wrote:
Most spline failures occur for one of 4 reas= ons.

1. =C2=A0Misalignment, either axially or radi= ally.
2. =C2=A0 Excessive clearance, =C2=A0allowing torsional vib= rations to accelerate wear. =C2=A0
3. =C2=A0 Inadequate shaft siz= e for the application. =C2=A0
4. =C2=A0 Mismatch of involute spli= ne pressure angle

The input shaft on the RD1 drive= was the biggest PITA to fabricate due to the need to address theses factor= s. =C2=A0Have never seen a problem on RDx input splines (lubricated or not)= but greasing the spline is a good idea if for no other reason than to prev= ent rust. =C2=A0There really should be almost no wearing friction in a prop= erly designed splined shaft.

Having said that, I a= lways felt good about the ability to visually inspect the input shaft splin= e on the RD1 drives. =C2=A0 I like to use "Chain Wax" (aerosol sp= ray made for lubricating motorcycle chains) for things like this. =C2=A0 Sp= ray it on anything you want to protect from rust or corrosion.

Tracy=
Sent from my iPad

On Sep 17, 2014,= at 8:24, "hoursaway1" <flyrotary@lancaironline.net> wrote:
As a Cadillac tech for 25 years, I saw this = same type of failure of the 6L50 trans output shaft to transfer case input = shaft in CTS, STS & SRX=C2=A0 all wheel drive cars starting in 2006 or = 2007 with verying miles ( 20,000--60,000 ). The two came together, unlubed = & open to the atmosphere, Michigan, moisture, oxygen, corrosion, failur= e. My wife wanted a 2008 SRX=C2=A0in 2009 so the first thing I did was onto= the hoist it goes & Zep 2000 spray grease ( this sprays out very thin = & fluid like then firms up & does not dry out, highly recommend ) i= nto the top opening until poured out the bottom, 0-prob. for 90,000 miles t= hen sold.=C2=A0 Watch for the telltale signs of THE DUST.=C2=A0 How you doi= ng Doug.=C2=A0=C2=A0=C2=A0 David R. Cook RV6A Rotary.=C2=A0

From: "Fly rotary blog, e-mail" <flyrotary@lancaironline.net>
To= : "Fly rotary blog, e-mail" <flyrotary@lancaironline.net>
= Sent: Wednesday, September 17, 2014 6:36:48 AM
Subject: [F= lyRotary] Eggie 3rd Generation PSRU failure again, etc.

One would have naturally thought that a "3rd Generation" PSRU would be the "cat'= ;s meow"; but that evidently isn't the case, and it almost cost a = pilot and pax in an RV-9A their lives!=C2=A0 The below report (see link) al= so states that there have been quite a few failures of this PSRU, and one c= ame after only 160 hrs of usage!=C2=A0 Amazing the "snake oil" th= at is out there and ready to hurt people...

http://www.ntsb.gov/aviationquery/bri= ef2.aspx?ev_id=3D20140224X15602&ntsbno=3DERA14LA130&akey=3D1

I hope to get after the 13B FWF on my RV-9A this = winter and have it ready for an engine run in Feb or March when it warms up= a bit.=C2=A0 This FWF package is the one that I bought from Tommy James ba= ck in 2005 or 6 (has it been that long ago?), and he flew it for 60 hrs or = so in his Glastar.=C2=A0 It is really time to get it finished up I think! <= br>
Fly safe out there! =C2=A0

Dou= g Lomheim
RV-3A restored and flying
RV-9A moving to the top of the &= quot;to do" list again!=C2=A0 :)





--001a11c2c5c25679a305035e9d54--