Ed,

To confirm this, could you have a rockwell hardness test performed on the old seals?  It sure would be nice to know if the Hurley seals are defective.  Good luck with the new engine.

 

Mark S. 

 

 

-------------- Original message --------------

> Right, John
>
> This past Saturday was two weeks from the incident, mainly waiting for
> parts. I tore down and rebuilt the engine over 3 days, but actually time
> was probably around 10 hours. Total cost was closer to $2500 what with
> both new rotor, housings gaskets, seals, etc. However, I believe a complete
> rebuild of a Lycoming with all new cylinders and pistons, etc, would have
> run a bit more {:>) Not infrequently a catastrophic failure of a Lycoming
> means replacement of the crank and even the case, if a rod let go. So all
> things considered I'm sure glad I fly behind a rotor.
>
> The more I think about my incident and having talked to two other folks who
> used the Hurley seals and later took their engine apart, that what may have
> been the dominant factors were soft seals and sloppy apex slots. My friend
> in Az just took apart one of this two engines that he had flow with (not
> related to a apex seal problem), he reported that he was surprised at how
> worn his Hurley seals were. Very similar to mind with a considerable amount
> of material removed the length of the seal where it rubbed against the edge
> of the slot. I think Rusty also reported the same.
> A second person who had his engine apart due to an oil leak reported the
> seals from Tracy Crook/Bruce T looked like new.
>
> If the seals were soft either by design for failure in the manufacturing
> process, then the wear and lost of material in a critical area of the seal
> combined with side forces due to the worn slot were probably not a
> combination due for long life.
>
> Going out this AM to install the engine in the aircraft, hopefully will have
> it ready to by tomorrow.
>
> Best Regards
>
> Ed A
>
>
> ----- Original Message -----
> From: "John Slade"
> To: "Rotary motors in aircraft"
> Sent: Sunday, April 24, 2005 11:35 PM
> Subject: [FlyRotary] Re: EWP Installation Update
>
>
> >> Well, Bob, I did finish the engine rebuild tonight and loaded it
> >> in the Van.
> > What's that, Ed - 2 weeks waiting, maybe 4 days work, and about $1500 in
> > parts?
> > This whole story makes a very interesting comparison to the Lycoming
> > powered
> > Cozy that recently threw an exhaust valve at 6000' over Long Island. He
> > barely made it into Farmingdale where it is now parked behind an FBO while
> > the owner figures out how to either come up with $15k .... or....???
> >
> > John (new wood floor all done....next?)
> >
> >
> >
> >>> Homepage: http://www.flyrotary.com/
> >>> Archive: http://lancaironline.net/lists/flyrotary/List.html
> >
>
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html