flyrotary@lancaironline.net Mailing List Archive

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Tracy –

Thanx Much on the EM-2 re-work. I’m hoping to get my medical back today or at least in the next couple of days. The engine is back in the plane and, as you know, I’m itching to get in the air again.

I wish I could give you better information on the wear I just wasn’t’ able to hang around Dave’s place very long (I had dropped the wife off at a quilt store with the usual “I’ll be right back”). When I thought about it last night what I may be remembering is the front bearing in the cast iron housing and the bearing in the front rotor. Since they are right next to each other this may be what I’m remembering. They disassembled from the rear housing first and the last thing they would have done would have been to take the front rotor out and probably laid it on the center housing and then they would have seen the front bearing wear and pointed then to the bearing in the front rotor that is adjacent to that front bearing. I guess if I were a little more familiar with the innards of the rotary the mental picture would be a little clearer. L

I’m not sure why he replaced the rotor housings. It may just have been for convenience since he has a rack of rotor housing from a variety of years that are cleaned and ready to go. Perhaps he wanted to clean up the original housings before re-using them and didn’t want me to have to wait? Hard to know without asking him – and I didn’t think of it while I was there.

Right now I’m just hoping for a brand new medical, and a nice and easy engine start so I can go fly! (Of course, after 2 or more hours of ground running to confirm everything is hanging together L ).

Thanx,

Joe Hull

Cozy Mk-IV #991 (In Phase1 Flight Test - 10.9 hrs flown)

Redmond (Seattle), Washington

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Tuesday, May 09, 2006 7:01 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Was Oil Pressure and Now...

----- Original Message -----

From: Joe Hull

To: Rotary motors in aircraft

Sent: Monday, May 08, 2006 12:04 PM

Subject: [FlyRotary] Re: Was Oil Pressure and Now...

>Glad you got it turned around so quick Joe. The Two rotor housings replaced makes me very curious >though. What was wrong with the originals?

>

>Other than a minor delay in the thermostat opening, I doubt that the reversed cooler connections had any >effect.

>

>There is no bearing in the center housing so I assume David meant rear housing.

Not sure why the rotor housings were replaced – it may just have been easier. I’m trying to remember the second area of wear. If I recall it was in the center housing where the E-shaft goes through the center housing and just on the forward 1/10”. Doesn’t the E-shaft rest on some bearing in the center housing?

I got the engine back in the plane on Saturday and turned it over with out plugs to check out oil flow. Oil flows quite well out the oil return line from the oil cooler by just turning the engine over. I then connected that line to the engine and removed the oil return line from the PSRU and turned it over. It took a while but began to get a good oil flow from the PSRU (of course I had emptied the PSRU of all oil when I took everything apart. So, now all I need is my EM-2 back from Tracy (hint hint) so I can start the engine. I’m a little skittish starting the engine without knowing what the oil pressure is J

Thanx Guys!

Joe Hull

Hi Joe,

Will get your EM2 finished up today. The update was easy (takes 5 minutes) but the change to the LCD screen that you asked for takes me several hours (hence the delay). Should be ready tomorrow though. Laura will send you the bill.

Good used 2nd gen rotor housings are getting to be rare as hens' teeth and new ones are $400+ each so they are rarely replaced just because it is easier : )

If the Eshaft touched anywhere in the center housing there was a MAJOR problem with the engine. Just wish we knew what it was. A bad or improperly installed thrust bearing would be my guess if this was what actually happened. As always, 3rd hand engine problem diagnosis is iffy, so this is just FWIW.

Tracy