Tracy - I've been using Boeshield T-9.  In your opinion, is this acceptable?

R/
Luis Luciano
Velocity XL-5 "Dulciena"

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Wednesday, September 17, 2014 11:00 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Eggie 3rd Generation PSRU failure again, etc.

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" <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  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" <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.


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!  :)