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Aviation uses tachometer time when changing oil and tracking aircraft total time. Most at $185,000 are IFR and have an autopilot.

The original build was bad, But please watch the control arm It will crack and possible break from the flexing of the tailwheel spring travel!

This has always been a problem when the tail wheel control arm is attached to the same horn as the rudder cables. There really should be a separate horn for the tailwheel control arm! It is not just this model plane!

did you check the type of ribits used. I would recommend to replace all the ribits to specs or better specs to be sure.

Nice looking plane. Nice video. To me better with real sound though...

"I almost died" Not even close.

HOLY S----T. WOW.

The loss of the rudder is not automatically a death sentence as stated in this post. The correct procedure in the event of a spin in which you cannot determine the orientation, is to reduce the power and release all the controls. This is taught because if you become disoriented and apply the wrong inputs you can accelerate or flatten a spin, which may be unrecoverable with insufficient altitude above the ground. The design of the aircraft, assuming that it is within the CG envelope, will allow the aircraft to self recover from the spin. The rudderless landing is also not going to kill you, if you take the proper actions. Find a long and wide runway that is into the wind and has a rescue crew. Differential braking will keep you going strait just like landing a tail dragger in a crosswind. The rescue crew is there to get you out of the plane if it ends up inverted due to running off the runway. Your post was useful however to point out the importance of proper construction, inspection, and paying attention to the hairs on the back of your neck.

Love the rotating cam on the tail.

Looks like a design fault. I would never fly a plane that looks as ugly as Sonex anyway. And especially with VW engine because the Sonex creator's son was killed in a Sonex with this engine.

trust your gut good man.

Wrong size rivets or the holes were drilled too large.

❤

Great plane! I’m in research mode and expect to work on my license coming up. This is exactly the type of aircraft I’m looking for.

Chills

Never attach the tail wheel to the rudder itself. They need to be separate.

Do not attach tail wheel to rudder.

As others have said... install a reverse scoop to bottom of the cowl. It will put a vacuum in the cowl and will scavenge the hot air more efficiently.

I think even the correct design is flawed. In my view a line between the pushrod end joints should be parallel to the axis of the rod the tailwheel is on. Then you have motion that uses parallelogram geometry. The current geometry can produce some big loads when the tailwheel is deflected upwards, and there will be some 'bump steer'. Moreover, I think I would prefer to separate the tailwheel connection from the rudder control cables a little further forward in that control system. I think further failure would be slow, because all the rivets on the right side of the bottom rudder rib were holding on.

Valuable video for everyone; not only Sonex owners. Well done, and it's nice to keep you in the land of the living ! Good comments from Sonex.

I have been doing a little searching and can see a reference as to what kit to buy for my Aerovee? am i corrcet in saying part #TS1085 ??? please help. Regards Andy

I am also based at KMRY and I built a Onex. I fly it regularly. I haven’t seen another one in the area but I’d like to.

Hey im based at KGCY with the Dyke Delta. I recognize the Maule in the background. Idk of you habe a 2 seat machine but id like to fly with you and your welcome tona flight in the Delta.

The pushrod bearing is wobbly onto the rod itself. That is enough to tell any pilot that there is something wrong with that attachment. For a pilot that has aircraft mechanical knowledge, detecting that problem would've been easy. For the pushrod to get to that stage there was probably many flights before that critical situation. There's lots of guys that purchase kits and don't really follow the instructions. When I decided to build my RV-8 some friends told me "oh why don't you buy the kit from people that did not finish?" they sell if cheap. My answer; probably because they did not know what they were doing and noticed that the kit requires way more knowledge that they have and that is a monumental task to accomplish. So they sell the kit. The reason I decided to build the RV-8 is because I wanted to have a brand new aircraft. Furthermore, build completely by myself so I know EXACTLY what is, where is, how is the condition of anything at any place in my aircraft. I would never buy any aircraft from anybody nowadays. There's so many lemons out there. My build, my peace of mind.

My gut would drop seeing that. Under normal flying conditions on a tricycle gear, you can likely get home safely without the rudder. As long as you don't spin the airplane. You might need new pants, though. Losing the rudder in a tailwheel is life threatening. Enter a spin with either gear and you're a goner. You're not required to carry a parachutes for such maneuvers flying solo but seeing that would make anyone question if they should. I could never buy a homebuilt put together by someone else. To me the point of building it is that you understand the construction and how to solve issues.

Always listen to your gut my fellow aviators.

I Call You Lucky & I'm Glad For You, Man! So, One Year Later, Was Anything Definitively Determined? I Heard You Mention Something About The Rivets. Thank You.

Increadible camera work and editing, my friend. great flying as well!!

That was God. Saw a Bonanza land one day and entire ruddervator moving around like that due to popped rivets from stress.

Wow. Close one. Looking forward to the fix and finding the cause of the failure.

Fly NAVY!

My kind of trip!

I'm an aerospace engineer and this video illustrates my reluctance to buy a homebuilt aircraft. Playing with avionics is one thing but there's a reason people get aerospace engineering degrees. Control systems and primary flight structures need to be left to people who know about them. And yeah, I wouldn't expect that rudder to have stayed on in a spin and the aircraft wouldn't have recovered without it. I would guess the guy's chances would have been 50/50 with a chute, 0 without one. He got lucky.

Thank you for posting this very critical inspection analysis! It has been most enlightening!

That's an awesome! B safe and have fun! Would be great to see your trip!

Good to see you back.

Wow Monterey! Close by to my home base in Watsonville KWVI. Maybe I’ll see ya around. Safe travels 🛫

Just curios what’s the cost per hour?

Flying experimentals has a unique set of risks. Like with any flying, all you can do is mitigate the risk. The only way to mitigate that kind of risk is with more frequent in depth and thorough inspections. If you haven't already, I strongly recommend you take the sixteen hour course that allows you to conduct your own condition inspection. Conduct a thorough condition inspection every 6 months and not a day less when flying experimental aircraft.

Have you ever experienced any tail wheel shimmy with this aircraft? The forces from a shimmy could have worn the rivets over time.

holy moly this is sick! I need one of these

What are the flying characteristics of the Onex? Is it stable on all axis? Is it suitable for long cross-country (3-4 hour legs)? Thanks.

I believe the non-standard control rod was the previous owners "fix" for the problem you describe. Unfortunately, the stress analysis is wrong. By landing in a right cross wind, with mains on the ground, holding left rudder to counteract the weather vane effect, the tail wheel is cocked when it touches the runway and jerks on the control link. There is a reason that tail wheels usually have spring isolated controls. Changing the control rod won't do anything to correct this problem. Even it the rudder cables somewhat dampen the force so you don't notice it in the pedals, there is enough inertia in the rudder assembly to do the damage. Shock loads hammer the connections.

You should replace the hardware, with a new set. You can't make the whole bigger that's not to the specs.

Original design is not optimal. Scrap-it, install a good system with springs and that is adjustable.

I’m going to check my Sonex tail the next time I get to the hanger I’ll let you know thanks if you find anything else or think of anything let us know thank you 👍

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