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POSTING RULES

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03-27-2013, 07:36 AM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
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Quote:
Originally Posted by simpkinsona
I do remember that failure where the aircraft landed on federal land. It was a failure of the spined shaft and caused Jan to recommend grounding all non-dual mass flywheel installations. All the failures you mention occured with non dual mass installations, or are failures of other parts, not the gearbox.
I'm glad to see all the work you are doing for the alternative engine community, I just hate to see people pass up a reliable option.
-Andy
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Sorry Andy, you are not correct with your statement here. Many of the failures I listed have also happened to engines fitted with the "dual mass" flywheel. The input shaft is part of the gearbox system also. Jan is no engineer and never did any TV testing on these gearboxes so why would you think the change in flywheel will solve all the problems? I hope you are right but there is no science to back this up.
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03-27-2013, 12:09 PM
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Join Date: Jan 2005
Location: Brunswick, ME
Posts: 313
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Quote:
Originally Posted by simpkinsona
All the failures you mention occured with non dual mass installations, or are failures of other parts, not the gearbox.
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Hi Andy,
We have two verified failures of Gen 3 v4 gearbox internal parts, both were cracked welds where a gear was welded to a shaft. You are correct that these happened on "non dual mass" setups, but it is not completely correct to say there have been no failures with the gearbox.
We have also had several reported issues with the spline shaft (the shaft that connects between the engine and the gearbox), with the believed but not confirmed cause being misalignment of the gearbox to the engine when installed. Other minor issues have also been reported such as leaking seals.
I am a supporter of these engine packages as much as you are, and I hope to fly behind my 2009 E6 package one day. For safety reasons, I also support full disclosure so if there are any issues, however slight, we owe it to ourselves to discuss openly and work together to find solutions.
Just last week a Cessna 172 landed at my airport with oil streaming down the side and bottom of the cowling, with less than 2 qts left in the engine. A retaining clip had separated inside the valve cover, jammed sideways between a valve and the cover, thus piercing the valve cover allowing the oil to be pumped out. Just pointing out that even the little things are important.
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03-27-2013, 03:30 PM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
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Successes
One of the European Subaru users posted on Subenews today that he flew in his friend's IO-360/ Hartzell 7 recently. At the same fuel flows, the Lyc was 10-15 knots faster than his EZ30T with MT prop. His friend had all fairings on though and his plane has had the wheel fairings removed for winter operation so call it 5-7 knots faster or so.
He was appalled by the din though when he removed the headphones and the high vibration levels, especially through the floor pan compared to the Sube. He is so happy with the Sube, he is planning on building a new 7 with an EZ36 soon.
He has 247 hours on his EZ30T with no real problems.
Of course, there are many other success stories I could relate along with the tales of woe. I like to give a realistic balance of the experiences. Some people are pretty happy (even very happy) while others have been disgusted with the whole thing and replaced the FF with Lycoming. When these things work as intended, they are wonderfully smooth and trouble free. 
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03-27-2013, 04:38 PM
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Join Date: Feb 2005
Location: Chesterfield, Missouri
Posts: 4,514
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Ross,
I can not resist responding to your report on Subby smoothness, noise and floor vibration as reported from Europe.
Yes, the operation is SMOOTH, no debate there - except the floor.
It is my experience (after some 400 hours behind 2 engines) even with mufflers, the Subby is very noisy (about the same as Lycoming with 4 straight pipes) And with the Egg muffler hangers from the bottom floor, the floor was ALIVE to the point I wondered about eventual skin failure.
The pipes induce vibration, a lot of it. Maybe that's why the rest of it seems so smooth. The canopy rail is dead smooth but not the floor under your shoe. 
__________________
RV-12 Build Helper
RV-7A...Sold #70374
The RV-8...Sold #83261
I'm in, dues paid 2019 This place is worth it!
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03-27-2013, 08:35 PM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
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Quote:
Originally Posted by David-aviator
Ross,
I can not resist responding to your report on Subby smoothness, noise and floor vibration as reported from Europe.
Yes, the operation is SMOOTH, no debate there - except the floor.
It is my experience (after some 400 hours behind 2 engines) even with mufflers, the Subby is very noisy (about the same as Lycoming with 4 straight pipes) And with the Egg muffler hangers from the bottom floor, the floor was ALIVE to the point I wondered about eventual skin failure.
The pipes induce vibration, a lot of it. Maybe that's why the rest of it seems so smooth. The canopy rail is dead smooth but not the floor under your shoe. 
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This is the turbo engine. Way quieter and totally different noise signature from the atmo Subes. My turbo 4 and the STi up here too, very quiet inside and out. That's why I like turbos, quiet, powerful, smooth.
I agree, the atmo EZs are painful above 4500 rpm with a very piercing and annoying note inside the aircraft.
Last edited by rv6ejguy : 03-27-2013 at 08:45 PM.
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03-27-2013, 11:35 PM
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Join Date: Jan 2013
Location: US
Posts: 39
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Waiex on Barnstormers
Speaking of alternative and customer service.
There is a Waiex for sale on Barnstormers with a Viking Engine by some guy name Jan. Curiously no photos of the engine posted.
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