From: "Tracy" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.214.174; envelope-from=rwstracy@gmail.com
Subject: Re: [FlyRotary] Re: Eggie 3rd Generation PSRU failure again, etc.
References: <list-7150752@logan.com>
Content-Type: text/plain;
	charset=us-ascii
In-Reply-To: <list-7150752@logan.com>
Message-Id: <37181FAF-96FC-4A0E-8211-D00DE08B05DE@gmail.com>
Date: Wed, 17 Sep 2014 11:59:11 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (1.0)

Boeshield should be fine.  Never seen in in aerosol form though.  The  Chain=
 Wax aerosol makes it easy to get heavy lube into the spline without disasse=
mbly (on the RD1) was why I mentioned it.

Tracy

Sent from my iPad

> On Sep 17, 2014, at 10:56, "Luciano, Luis I CIV PEOSUB, PMS404P" <flyrotar=
y@lancaironline.net> wrote:
>=20
> Tracy - I've been using Boeshield T-9.  In your opinion, is this acceptabl=
e?
>=20
> R/
> Luis Luciano
> Velocity XL-5 "Dulciena"
>=20
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20
> Sent: Wednesday, September 17, 2014 11:00 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Eggie 3rd Generation PSRU failure again, etc.
>=20
> Most spline failures occur for one of 4 reasons.
>=20
> 1.  Misalignment, either axially or radially.
> 2.   Excessive clearance,  allowing torsional vibrations to accelerate wea=
r. =20
> 3.   Inadequate shaft size for the application. =20
> 4.   Mismatch of involute spline pressure angle
>=20
> The input shaft on the RD1 drive was the biggest PITA to fabricate due to t=
he need to address theses factors.  Have never seen a problem on RDx input s=
plines (lubricated or not) but greasing the spline is a good idea if for no o=
ther reason than to prevent rust.  There really should be almost no wearing f=
riction in a properly designed splined shaft.
>=20
> 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" (aero=
sol spray made for lubricating motorcycle chains) for things like this.   Sp=
ray it on anything you want to protect from rust or corrosion.
>=20
> Tracy
> Sent from my iPad
>=20
> On Sep 17, 2014, at 8:24, "hoursaway1" <flyrotary@lancaironline.net> wrote=
:
>=20
>=20
>=20
>    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--60,0=
00 ). The two came together, unlubed & open to the atmosphere, Michigan, moi=
sture, oxygen, corrosion, failure. My wife wanted a 2008 SRX in 2009 so the f=
irst thing I did was onto the hoist it goes & Zep 2000 spray grease ( this s=
prays out very thin & fluid like then firms up & does not dry out, highly re=
commend ) into the top opening until poured out the bottom, 0-prob. for 90,0=
00 miles then sold.  Watch for the telltale signs of THE DUST.  How you doin=
g Doug.    David R. Cook RV6A Rotary.=20
>   =20
>=20
> ________________________________
>=20
>    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: [FlyRotary] Eggie 3rd Generation PSRU failure again, etc.
>   =20
>=20
>    One would have naturally thought that a "3rd Generation" PSRU would be t=
he "cat's meow"; but that evidently isn't the case, and it almost cost a pil=
ot 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 o=
nly 160 hrs of usage!  Amazing the "snake oil" that is out there and ready t=
o hurt people...=20
>   =20
>    http://www.ntsb.gov/aviationquery/brief2.aspx?ev_id=3D20140224X15602&nt=
sbno=3DERA14LA130&akey=3D1
>   =20
>   =20
>    I hope to get after the 13B FWF on my RV-9A this winter and have it rea=
dy for an engine run in Feb or March when it warms up a bit.  This FWF packa=
ge is the one that I bought from Tommy James back in 2005 or 6 (has it been t=
hat long ago?), and he flew it for 60 hrs or so in his Glastar.  It is reall=
y time to get it finished up I think!=20
>   =20
>    Fly safe out there!  =20
>   =20
>    Doug Lomheim
>    RV-3A restored and flying=20
>    RV-9A moving to the top of the "to do" list again!  :)
>   =20
>   =20
>   =20
>   =20
>   =20
>=20
>=20