I started an Onex single place, folding wing clown plane in April of this year. The aft fuselage is starting to take shape. This is the opposite end of the experimental spectrum from Todd S’s Glasair and Gerry A’s Lancair Evolution.
This kit is a lot of fun to build because it has matched-hole construction. Instead of measuring and laying out rivet lines, all the holes are pre drilled by computer and everything goes together very precisely.
I am planning on putting a Camit 3300 with 120 horsepower into this airplane (the Camit is the same as a Jabiru 3300, Camit makes parts for Jabiru I believe). Normally these planes have an 80 hp VW conversion.
Before I rivet the turtle deck my wife and I will have to carry it up the basement stairs to make sure I can get it out. After I have all the big pieces made, I will move out to the garage to put the big pieces together.

Have fun with the Sonex George,
I have dinner with many of the Sonex people regularly, tomorrow evening as a matter of fact. They are really first class individuals.

Very nice, George. I think the OneX is a really cool airplane. It is amazingly roomy inside, and not all that difficult to get into for this "larger than the average bear" person.

I was planning to build a OneX, until I saw the Panther at Sun-n-Fun, and again at Oshkosh last year. It's similar to the OneX -- just a little bit bigger in all dimensions, especially in the cockpit area. The cockpit is huge, and very easy to enter/exit. It feels like I could even "bail out" with a parachute if I really had to...

The Panther looks a bit more like the RV3 (size and shape). It also uses "matched hole" construction, has folding wings, and offers similar performance to the OneX - maybe a bit faster, depending on which engine is in which plane. I'm hoping to show it to my wife at Oshkosh, and perhaps place my order.

The Camit 3300 is definitely on my "short list" of engines for the Panther. I'll also be considering the UL-Power 130 HP 4-cyl engine, although it's a bit pricey. The Panther prototype is flying with a converted Corvair engine, but I'm just not sold on that idea. The modified Corvair engine is pretty heavy for the power produced. You can probably get equivalent power from an O-233, O-235, or one of the "stroker" O-200s.

One other engine that sounds interesting, but is kind of "new" on the scene is the D-Motor 6-cylinder flat-head engine. Water cooled and weighs about the same as a Jabiru, and was designed to use Jabiru engine mounts. Some of the preliminary specifications seem a bit too good to be true, but even discounting them somewhat, it is an interesting alternative.

Camit actually builds the Jabiru engines under contract with the Jabiru company. Since the engines are type-certified in Australia, Jabiru won't allow Camit to make the changes that Camit engineers suggested to improve the engines. Those changes were intended to correct issues some owners were experiencing. Those issues, and subsequent engine failures (mostly of the 2200-series engines) eventually led to an Australian "AD-equivalent" that places severe restrictions on Jabiru-engined aircraft. With Jabiru's apparent blessing, Camit started offering their own version of the engines with all the changes their engineers recommended. I think Camit got it right.

Jim,

The Panther is a really good looking airplane, plus you can use a Lycoming in it, which I personally would prefer. I flew behind a Rotax 912 for a few years, but I am still warming up to experimental aircraft engines.