Inverza 33 ARF



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Required to Complete

Radio Equipment
- 6+ channel programmable transmitter
- 6+ channel receiver
- (5) high-torque standard servos

Gas Setup
- 30-35cc 2-stroke gas engine
- Propeller
- Spinner
- Standard servo (for throttle)
- Chargeswitch
- Ignition pack
- Receiver pack
- Pilot figure (optional)

Electric Setup
- Power 180 motor
- EP motor mount (HAN492515)
- 80+ amp high-voltage brushless ESC
- Propeller
- Spinner
- 37.0V 10S 4400-5000mAh flight pack
- Charger for flight pack
- Pilot figure (optional)


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


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
6+ channel radio system
(5) high-torque standard servos, (1) standard servo
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 :
80+ amp high-voltage brushless ESC
Recommended 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 (Rudder):
Low: 15mm right/left, 15% expo; High: 40mm right/left, 40% expo
Minimum Age Recommendation:
14 years
Experience Level:
Recommended Environment:
Assembly Time:
15-20 Hours
Is Assembly Required:
Control Throw (Elevator):
Low: 8mm up/down, 20% expo; High: 50mm up/down, 45% expo

Parts & Accessories

Completion Guides Recommended Radio Equipment   (See All)

  • Aluminum Sx Arm, 1.5" SPM JR

  • Aluminum Double Sx Arm, 3" SPM JR

  • DS8411 Digital Ultra Torque MG Servo

  • Heavy-Duty Servo Extension 3"

Completion Guides Electric Setup   (See All)

  • Thin Electric Prop, 22x10

  • Castle BEC PRO V2, 010-0004-01

  • Phoenix Edge HV 80-Amp 50V ESC

  • EC5 Device Connector (2)

Completion Guides 33cc Gas Setup   (See All)

  • Competition Pattern Propeller,18 x 8

  • Evolution 3 Wire Ignition/RX Switch

  • 33GX 33cc (2.00) Gas/Petrol Engine

  • Fuel Filler with "T" & Overflow Fitting

Parts Listing   (See All)

  • Fuselage with Hatch: Inverza 33

  • Hatch with Canopy: Inverza 33

  • Left Wing: Inverza 33

  • Right Wing: Inverza 33

Optional Accessories   (See All)

  • Competition Pattern Propeller,18 x 8

  • Thin Electric Prop, 22x10

  • Phoenix Edge HV 120-Amp 50V ESC

  • Phoenix Edge HV 80-Amp 50V ESC

Building Tools   (See All)

  • ZAP A Gap CA+ Glue, 1 oz

  • ZAP CA Glue, 1 oz

  • ZAP 30 Min Z-Poxy, 8 oz

  • ZAP Z-42 Thread Lock, .20 oz
















1 Authorized Warranty Period (Date of Purchase)

What this Warranty Covers 
Horizon Hobby, Inc., (Horizon) warrants to the original purchaser that the product purchased (the "Product") will be free from defects in materials and workmanship at the date of purchase.

2 Authorized Limited Warranty & Limits of Liability International

What is Not Covered
This warranty is not transferable and does not cover (i) cosmetic damage, (ii) damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or due to improper use, installation, operation or maintenance, (iii) modification of or to any part of the Product, (iv) attempted service by anyone other than a Horizon Hobby authorized service center, (v) Product not purchased from an authorized Horizon dealer, or (vi) Product not compliant with applicable technical regulations.


Purchaser’s Remedy
Horizon’s sole obligation and purchaser’s sole and exclusive remedy shall be that Horizon will, at its option, either (i) service, or (ii) replace, any Product determined by Horizon to be defective. Horizon reserves the right to inspect any and all Product(s) involved in a warranty claim. Service or replacement decisions are at the sole discretion of Horizon. Proof of purchase is required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.

Limitation of Liability
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY OR ANY OTHER THEORY OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted. As Horizon has no control over use, setup, final assembly, modification or misuse, no liability shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the user accepts all resulting liability. If you as the purchaser or user are not prepared to accept the liability associated with the use of the Product, purchaser is advised to return the Product immediately in new and unused condition to the place of purchase.

These terms are governed by Illinois law (without regard to conflict of law principals). This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Horizon reserves the right to change or modify this warranty at any time without notice.


Questions, Assistance, and Services
Your local hobby store and/or place of purchase cannot provide warranty support or service. Once assembly, setup or use of the Product has been started, you must contact your local distributor or Horizon directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance. For questions or assistance, please visit our website at, submit a Product Support Inquiry, or call 877.504.0233 toll free to speak to a Product Support representative.

Inspection or Services
If this Product needs to be inspected or serviced and is compliant in the country you live and use the Product in, please use the Horizon Online Service Request submission process found on our website or call Horizon to obtain a Return Merchandise Authorization (RMA) number. Pack the Product securely using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection. Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise until it arrives and is accepted at our facility. An Online Service Request is available at If you do not have internet access, please contact Horizon Product Support to obtain a RMA number along with instructions for submitting your product for service. When calling Horizon, you will be asked to provide your complete name, street address, email address and phone number where you can be reached during business hours. When sending product into Horizon, please include your RMA number, a list of the included items, and a brief summary of the problem. A copy of your original sales receipt must be included for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.
NOTICE: Do not ship LiPo batteries to Horizon. If you have any issue with a LiPo battery, please contact the appropriate Horizon Product Support office.

Warranty Requirements
For Warranty consideration, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met, your Product will be serviced or replaced free of charge. Service or replacement decisions are at the sole discretion of Horizon.

Non-Warranty Service
Should your service not be covered by warranty, service will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for service you are agreeing to payment of the service without notification. Service estimates are available upon request. You must include this request with your item submitted for service. Non-warranty service estimates will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight. Horizon accepts money orders and cashier’s checks, as well as Visa, MasterCard, American Express, and Discover cards. By submitting any item to Horizon for service, you are agreeing to Horizon’s Terms and Conditions found on our website

ATTENTION: Horizon service is limited to Product compliant in the country of use and ownership. If received, a non-compliant Product will not be serviced. Further, the sender will be responsible for arranging return shipment of the un-serviced Product, through a carrier of the sender’s choice and at the sender’s expense. Horizon will hold non-compliant Product for a period of 60 days from notification, after which it will be discarded.

United States:
Electronics and engines requiring inspection or repair should be shipped to the following address:

Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822

All other Products requiring warranty inspection or repair should be shipped to the following address:

Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822

Please call 877-504-0233 or e-mail us at with any questions or concerns regarding this product or warranty.

United Kingdom:
Electronics and engines requiring inspection or repair should be shipped to the following address:

Horizon Hobby Limited 
Units 1-4 Ployters Rd
Staple Tye
Harlow, Essex
CM18 7NS
United Kingdom

Please call +44 (0) 1279 641 097 or e-mail us at with any questions or concerns regarding this product or warranty.

Electronics and engines requiring inspection or repair should be shipped to the following address:

Horizon Technischer Service
Christian-Junge-Strasse 1
25337 Elmshorn

Please call +(0) 49 4121 2655 100 or e-mail us at with any questions or concerns regarding this product or warranty.

Electronics and engines requiring inspection or repair should be shipped to the following address:

Horizon Hobby SAS
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Please call +33 (0) 1 60 18 34 90 or e-mail us at with any questions or concerns regarding this product or warranty.

China:                                                                                           Electronics and engines requiring inspection or repair should be shipped to the following address:

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Shanghai, China 200060

Please call +86 (021) 5180 9868 or email us at with any questions or concerns regarding this product or warranty.



Modified: 11/13/2012