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From: "Joe Berki" <jskmberki@alltel.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1365815@logan.com>
Subject: Re: [FlyRotary] Departed Exhaust
Date: Wed, 6 Sep 2006 21:48:24 -0400
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Buly,
I am glad that you are safe.  What dimensions on the exhaust pipes need to
be changed?  I am wondering ir the cast iron exhaust might solve some of
thes issues.  Unfortuntly I will need to modify or build a nes engne mount.

Joe Berki
Limo EZ
Canard in primer

----- Original Message ----- 
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, September 06, 2006 7:57 AM
Subject: [FlyRotary] Departed Exhaust


> Hi Buly, great to hear about your flight and happy to hear the missing
> exhaust component did not cause damage - however, I would inspect the prop
> blade very closely to make certain no small cracks in blade - particularly
> near the hub.
>
>  Yes, I have pulverized sufficient metal by trying different exhaust
> internals to say that the shock of the exhaust pulse particular with a
turbo
> block is tremendous.  I have destroyed 1/8" thick stainless steel in a
> matter of hours.  It appears that if a exhaust component is perpendicular
to
> the front of the shock wave, the impact on the component is such to reduce
> its life to almost nil.  If the component is at an angle then its life is
> much longer.  The constant flexing of the metal at 200 times/sec at 6000
rpm
> caused by the strong exhaust pulse fatigues the metal extremely rapidly.
>
>  The joke around my airport is "You can hear Ed long before you can see
> him!"  - my response is that its a safety feature to let others know I am
on
> my way inbound{:>).
>
> Ed
> Ed Anderson
> Rv-6A N494BW Rotary Powered
> Matthews, NC
> eanderson@carolina.rr.com
> http://members.cox.net/rogersda/rotary/configs.htm#N494BW
> ----- Original Message ----- 
> From: "Bulent Aliev" <atlasyts@bellsouth.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Wednesday, September 06, 2006 7:17 AM
> Subject: [FlyRotary] Re: OT: Gardenhose as level
>
>
> > Joe, it was a "shake down" alright with an exhaust problem like yours.
> > on Sat we did some takeoffs and landings with the CFI Ron Miller.  With
> > gross weight of 1850 pounds, on takeoff I'm getting 6500-7000  rpm and
> > climb rate of about 1000 fpm. Than we went to 1500 ft over  the airport
> > and i did some steep turns etc for about 40 min. It flies  like a dream
> > (compared to C-172 :). Transponder did not work again.
> > Next day we got a waiver for the transponder and headed to an old
> > uncontrolled military field with two huge 5000 ft runways, so i can
> > practice landings and takeoffs. So we took off and headed for our
> > destination at 3500 ft over alligator country. Pulled back the power  to
> > 5000 rpm and we were cruising at 140 knots. Nothing spectacular,  but i
> > kept the prop at low pitch to go easy on the engine. 15 min   later, we
> > heard a bang and the plane felt like we run over a rock.  First reaction
> > look for a place to land. But soon everything checked  out and the
engine
> > kept running normal with temps at 185-187F degrees  with OAT at 85F.
> > Landed OK at our destination and taxied to the FBO.  Ron got out first
and
> > started looking, but can not find anything  wrong? I got out and noticed
a
> > slight scuff like a drag mark 3" wide  on one of the Ivo blades starting
> > about where the exhaust would be  and going to the tip. The las oval
piece
> > of my shiny new exhaust was  missing. Mystery solved. Ivo is a one tough
> > prop to survive a 3" long  3" diam. SS pipe going hitting the blade.  We
> > continued with the  training and I was getting good at it but with lots
of
> > full power  takeoffs and not enough time for the engine to cool down,
some
> > of the  coolant boiled out on takeoff and we came down to replace to add
> > more  coolant and check under the hood. Added some water, cleaned the
> > plugs, just in case and took off again.
> > By now it was a sweltering heat with jungle like humidity and after  few
> > landings, we headed home. The trip was uneventful, the engine was
running
> > fine around 5000 rpm. The biggest surprise later was after I  removed
the
> > SS heat shields from around my new exhaust pipes. one  pipe was totaly
> > separated at the weld, another was half cracked.
> > Sound familiar Joe:) The exhaust pulses must be ferocious? people on
the
> > ground said they can hear me long before they can see me coming:)
> > More later. Got to go to work.
> > Bulent "Buly" Aliev
> > FXE Ft lauderdale, FL
> > http://tinyurl.com/s5xw8
> >
> > On Sep 5, 2006, at 11:47 PM, Joe Hull wrote:
> >
> >> OK - it's supposed to be "Shake down cruise" - don't tell me you  broke
> >> down
> >> somewhere!!
> >>
> >> But congrats on flying it anyway!!
> >>
> >> Joe Hull
> >> Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)
> >> Redmond (Seattle), Washington
> >>
> >>
> >>> -----Original Message-----
> >>> From: Rotary motors in aircraft  [mailto:flyrotary@lancaironline.net]
On
> >>> Behalf Of Bulent Aliev
> >>> Sent: Tuesday, September 05, 2006 8:20 PM
> >>> To: Rotary motors in aircraft
> >>> Subject: [FlyRotary] Re: OT: Gardenhose as level
> >>>
> >>>
> >>>>
> >>>> Guess I need to buy some expensive clear hose .....
> >>>> Finn
> >>>
> >>> Finn, if you buy the right size, one day you can used for your fuel
> >>> lines on the next airplane. Worked very well on the first one :)
> >>> Buly
> >>> Finally checked out in my plane.
> >>> Did my first 100 mile "cross country". Or should I say "break down
> >>> cruise" :),
> >>>
> >>> --
> >>> Homepage:  http://www.flyrotary.com/
> >>> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
> >>
> >>
> >> --
> >> Homepage:  http://www.flyrotary.com/
> >> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
> >
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
> >
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
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>
>
> -- 
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