Inverza 33 ARF by Hangar 9 "Petrol"
This looks nice
From a project that began as a “what if” with acclaimed full-scale builder Kevin Kimball and Quique Somenzini, the Inverza is a contemporary concept designed to harness the power of the radial engine with the potential only possible in a monoplane platform. For the finishing touches, Mirco Pecorari shared his expertise by complementing the modern concept with a stunning color scheme.
Although the full scale Jim Kimball Enterprises Inverza™ airplane is yet to be built, you can enjoy the most balanced aircraft ever to be introduced for the aerobatics community. The Hangar 9® Inverza 33 aerobat has been developed to take advantage of both the emerging 30cc gas engine and 180-class outrunner electric power system popularity. Designed by the master, Quique Somenzini, whose pursuit of precision elevated him through the Extra and Yak aircraft series, the new Inverza concept promises to become his next great contribution. With its modern outline and features, the Inverza offers “no compromise” precise aerobatic capability for both scale aerobatics and aggressive 3D. Its massive control surfaces and generous wing area makes it very stable and predictable during the most demanding 3D maneuvers such as those that occur at slow speed, or while in a hover. The design also takes advantage of all the previous designs Quique worked with before making the Inverza not only a new benchmark in precision, but also an evolutionary step toward achieving an aircraft with balanced maneuverability. When setup correctly, no matter what attitude the Inverza is flown, very little to no control coupling is evident whether the maneuver is upright, inverted or knife-edge. The result is a flight experience that’s pure even when you’re control input is aggressive.
Covered in genuine UltraCote®, its balsa/balsa-plywood structure is strong and light, while Mirco Pecorari’s original color scheme offers stunning looks, incredible ground presence and high visibility in the air. Its two-piece wing connects with a carbon fiber wing tube and the ailerons and elevators are pre-hinged with a tight seal so you can get flying faster. The oversized hatch features a tinted canopy, scale instrument detail and an ideal location for the pilot figure of your choice. Other great features include a factory painted aluminum landing gear, plus a factory painted fiberglass cowl and matching wheel pants.
Power it with the Evolution® Engines 33GX 30cc gas engine, the Inverza 33 is ideal for entry-level aerobatic pilots and giant-scale fans looking to modernize with a sensibly sized airframe bursting with performance. For those who prefer electric, the E-flite® Power 180 outrunner on a 10S Li-Po battery system can deliver unbridled performance.
Quique Somenzini design
Generous wing area for an extra-light wing loading
Oversized control surfaces for superior slow speed maneuverability
Engineered to fly upright, inverted and knife-edge without mixing
Vivid Mirco Pecorari color scheme with genuine UltraCote® covering
An evolutionary original design purpose built for modern precision and 3D aerobatics
Durable aluminum landing gear with painted finish
Two-piece, plug-in wings with carbon fiber tube joiner
Lightweight balsa/balsa-plywood construction
Pre-hinged control surfaces
Pre-set and drilled for the Evolution® 33GX gas engine
Tinted canopy and cockpit instrument detail (pilot optional)
Electric power system conversion kit—sold separately
Wingspan: 75.0 in (190 cm)
Overall Length: 72.0 in (183 cm)
Wing Area: 1120 sq. in. (72.5 sq. dm.)
Flying Weight: 12.3-13.0 lb (5.60-5.90 kg)
Engine Size: 30-35cc 2-stroke gas
Motor Size: Power 180
Radio: 6+ channel radio system
Servos: (5) high-torque standard servos, (1) standard servo
Recommended Receiver Battery: 2150mAh 6.0V 5-cell Ni-MH receiver pack
Trim Scheme Colors: UltraCote Bright Yellow (U872), Sky Blue (U875), Midnight Blue (U885)
CG (Center of Gravity): 5.51-5.71 in (140-145mm) back from leading edge of wing at wing root
Wing Loading: 25.1 oz/sq ft (76.6 g/sq dm)
Prop Size: 18 x 8 (Evolution 33cc gas), 22 x 10E (Power 180)
Spinner Size: 3.0 in (76mm) P-51 style
Speed Control: 100+ amp high-voltage brushless ESC
Recommended Motor Battery: 37.0V 10S 4400-5000mAh Li-Po pack
Control Throw (Ailerons): Low: 50mm up/down, 40% expo; High: 95mm up/down, 45% expo
Control Throw (Elevator): Low: 8mm up/down, 20% expo; High: 50mm up/down, 45% expo
Control Throw (Rudder): Low: 15mm right/left, 15% expo; High: 40mm right/left, 40% expo
Main Wing Tube Length: 974mm
Main Wing Tube OD: 32mm
Tail Wing Tube Length: 360mm
Tail Wing Tube OD: 12.7mm
Is Assembly Required: Yes
Assembly Time: 15-20 Hours
Plane Type: Aerobatic & 3D
Experience Level: Advanced
Power Plant Size: 1.6-2.4 2-Cycle Gas
Recommended Environment: Outdoor
Fuel Type: Gas
sounds like very small drawbacks to me....
Just noticed that we have been posting in the "Electric" section
Not this one made for the "Gas" version so i have swapped my Inverza 33 build to this thread as mine is definitely "A Gasser!" Here is where i am up too!
One question has anyone and i mean anyone been able to fit the cowl with the muffler fitted to the motor i have tried for ages and just can't see how it can be done following the instructions given after every other part of the build has gone so smooth i'm a little peeved off about this
Joined Jan 2014
Yea I had the same problem and had to cut the cowl ring to get it on easy. This is the best way as the evo is a very hard to tune so the cowl needs to come off easy.this is the only problem with the kit apart from the rubbish tank. I also changed this.just a but of info if your running the evo33 don't fire the engine with the choke engaged or it's a pig to start. I got shown the best way last week.choke on turn over 6 times then choke of and it fires every time. Needed a new plug after 3 gallons of fuel.
Ohh well,i have been posting on the other thread also,but though personally it was better to have one thread for both elec/gas cause of the little feedback in the first place on the Inverza-33, having two threads could make this issue worse,just my opinion...But it's not my thread so this is not my call,if Gas inverza stuff needs to be here then so be it and it's your thread chuck so it's up to you
Chuck,i don't see any problem cutting the cowl ring a little to put it on over the pipes (just IMO) i'm more than happy with the way i done mine and it makes it so easy to take off/put on the cowl for future reference,just my view on it....As for doing it anyother way Pffttt.... would it be worth the hassle? just saying....
Very nice build chuck,loving the pics,Great tidy looking work.
Never had any issues at all starting the evo engine,always a few turns of prop with choke on until it fires once,then choke off and it always starts after a few turns,very consistant engine it has been for me.....
As the GAS inverza stuff has been moved here i might do a build video /Flight thing at some stage,i'll see how it goes...
Here is my latest Flight,even woody agreed it was a great plane to Fly
Video of Inverza Test Flown by Sherrif woody, (don't know why it won't embed here but link works)
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