I don't think Hylomar is a sealant and would not recommend it for use on the RD-1x drive.   Current instructions for the drive describe a recommended procedure for separating the drive from adapter plate.  It also helps to put a light coat of oil and wipe off excess before assembly of the drive to adapter plate.

Tracy

Sent from my iPad

On Jul 12, 2011, at 1:22 AM, bktrub@aol.com wrote:

Ask  Tracy about using Hylomar as a sealant.

 

Brian Trubee

-----Original Message-----
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, Jul 11, 2011 10:15 pm
Subject: [FlyRotary] Re: Fwd: RD-1B failure

I tried to get into the gear box today, but ran into an impasse trying to get the bell housing off the adapter plate...  I think I am done using RTV there.  Will probably use a non-adhesive sealant - as long as Tracy says we don't need the adhesion from the RTV.

I did find another issue.  In addition to a likely fin failure inside the gear box, the flex plate is coming apart.  I found a piece of it in my cowl and it is tearing in several places. Still seems to be tracking OK.

You know, I wouldn't mind the weight penalty of using the manual flywheel.  Would have to drill some holes to attach Tracy's torque plate, but it should otherwise be an improvement for idle and pulse dampening.  But maybe gyroscopic loads would be unacceptably high?  Maybe have to move and/or replace the starter.

Will try to get some pictures tomorrow.

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

On Mon, Jul 11, 2011 at 11:51 AM, Mark Steitle <msteitle@gmail.com> wrote:

Al,

 

My gearbox failure was approx. 1-1/2 years ago.  I attributed the failure to a very rough running engine which was cured with a mod to the EC-2 and CAS.  I was lucky that it happened on the ground.  (Ed can keep his "King of Dead Stick Landings" plaque, thank you!) 

 

If I am correct, Tracy installed a 3/8" pin in my input shaft.  No failures since.  I now have approx. 200 hours on the engine/gearbox.

 

Mark

On Mon, Jul 11, 2011 at 10:23 AM, David Leonard <wdleonard@gmail.com> wrote:

From: Al Gietzen <ALVentures@cox.net>
Date: Mon, Jul 11, 2011 at 8:17 AM
Subject: RD-1B failure
To: Dave Leonard <wdleonard@gmail.com>

Hi; Dave,

 

I’m very thankful to hear that this occurred after landing.

 

I’ve been unable to post on the rotary engine list for months due to blocking by Cox.  Perhaps you’d post this message on my behalf:

 

---The shear pin on the sun gear is the most likely candidate since it was sized for a normally aspirated 13B.   After the failure on Marks 20B, I have changed the pin diameter

 

Tracy;

 

Doesn’t this suggest that all 20B and 13B turbo should be upgraded to the larger pin? When was the failure on Mark’s 20B?

 

Al

---