OK, so I planted the Eclipse this weekend......

[Bill]

The APC prop was a 15.75 x 13 and was on a YS 160 on Hyde soft mount with a nose ring.   I was not running engine at max rpm by no means although I did not take a tack reading, I did have the needle about 2.5 to 2 ¾  turns out with 30% nitro.   Talking with APC they indicated that had reported failures of 3 bladed props.  APC recommended to keep tip speed down.  Failure accrued at the hub of prop.  Tonight when I return home  I plan on sending some photo?s to Bob Pastorello, my camera is only 4 mega pixel with limited macro.  We found 1 blade and it looks like once  this blade failed it may of took out a 2nd.  We found engine with only 1 blade on hub.  Other blade was never found or near engine impact zone.  Engine was about 400 feet past where we found the first blade by a dirt road.  If I use a 3 blade prop again, It will be a carbon fiber type only!!!!!!!! Ed White may be able to add his observations. But I remember a buzz hearing lots of fiberglass breaking and a second !
 later seeing engine fall from plane. I am luck to have landed plane about 150 meters from me on its gear.    
> 
> From: "Charlie  Rock" <crock at kc.rr.com>
> Date: 2005/04/26 Tue AM 08:04:34 CDT
> To: <discussion at nsrca.org>
> Subject: Re: OK, so I planted the Eclipse this weekend......
> 
> Sorry to hear the rough landing of your long time trusted Typhoon..You flew it very well..I too am curious as to what you think happened to the 3 bld? Charlie Rock
>   ----- Original Message ----- 
>   From: William Ahrens 
>   To: discussion at nsrca.org 
>   Sent: Monday, April 25, 2005 10:53 PM
>   Subject: RE: OK, so I planted the Eclipse this weekend......
> 
> 
>   I don't have as good as explanation as Jerry.  But there I last Sunday pulling up to do a turnaround maneuver,  the full roll half reverse Cuban 8.  Just before rolling and applying power the engine departs the plane due to a blade breaking off my APC 3 blade prop, it was a very bad sound of balsa and fiberglass breaking occurring in seconds. The YS160 broke the beams of my soft mount and pulled thru the nose of my trusty old Typhoon 2000.  Yes I was experimenting with this prop and had about only about 5 hours of time on it.  As I see the engine fall from plane I decided to try and fly the plane back to the field.  Plane flipped up when the engine left,  I then realized the plane had poor flying qualities.  (Now I now what a really tail heavy plane feels like.)  , Needing control, I dove the plane to the ground to get airspeed.  During dive I was not making much progress to the field, I was not going to make the field due the wind at my back and the plane's poor flying !
 quality and would need to land in the farmers field.  It was like a roller coaster ride down with plane, just trying to keep the plane from flipping.  As I neared the ground I put the plane in a nose down attitude I pulled full up and flared about 2/3 feet above ground.  Plane hits ground nose first and the experiment is over.  Engine search took about 2 ½ hours to find.  We actually found the blade that broke off before finding engine.  Vibration, cracked fuselage and both ailerons on wings!!,  Typhoon will need a little work to fly again.
> 
>   Bill A.
> 
> 
> 
> 
> ------------------------------------------------------------------------------
> 
>   From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of bravo52
>   Sent: Monday, April 25, 2005 9:52 PM
>   To: discussion at nsrca.org
>   Subject: OK, so I planted the Eclipse this weekend......
> 
> 
> 
>   Yep, it is no more.  Man I loved that plane.  I loved the way it flew like a bullet.  Because of the "new" radio's and the fact that it isn't my primary plane, I programmed in some flaps.  Well, normally, when you deploy flaps without mixing in a little down, the plane pitches up.  I was a couple of mistakes high and my buddy said, "put down the flaps" and so I did.  Well, what happened next was probably the best looking crash I've seen in a long time.  Two things happened.  First, the nose pitched up so fast ( I think I was carrying too much speed) I think I sheered a control horn on the right aileron.  Then came the tuck.  Oh yea, that baby tucked nose under and rolled left.  I was on the flap switch faster than kiddies on candy but it didn't help.  With full opposite aileron, I could barley roll level.  Unfortunately, I was about 60 degrees nose down and picking up speed.  One of the qualities of the old Piorun Eclipse is little or no drag.  Any way, by the time I got!
  on the elevators and leveled out, it plane was about 3/4 of an inch off the ground and accelerating!  Then things started slowing down.  I think they call it temporal distortion.  In very slow motion, the plane was flying ever so smoothly across the ground when parts just started departing the aircraft.  The first to go was the prop blades.  I actually saw one fly off...that is right before the left horizontal stab tip just touched the ground.  Then it exploded in a cloud of foam.  Then, the left wing.  Pulled the wing tube right out of the fuselage.  Now mind you, the fuselage is still scooting along at Mach 3 shedding parts like crazy.  And even though it seemed like minuets, this all happened in about 5 seconds!  All the while, I'm thinking, "No problem, I got this.......".  In all, the fuselage in primarily intact.  The left wing is good, the right wing lost the wing tube and part of the wing root, allot of sheeting and some foam.  The left horizontal stab has left the!
  building.......... But......I think I can rebuild it!
> 
> 
> 
>   Jerry L.
> 
> 

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