Overview
The Nick Ziroli ERCO Ercoupe is a meticulously designed giant-scale model of one of America's most innovative light aircraft. Scaled at 1/4.5 with an 80-inch wingspan, this design combines the distinctive features of the full-size Ercoupe with conventional balsa and plywood construction techniques. The result is a model that is both practical to build and rewarding to fly, suitable for experienced builders who appreciate traditional aeromodelling.
This Varlocity Laser & Models laser-cut short kit provides the precision-cut components required to begin construction, allowing builders the satisfaction of completing the remaining structure using traditional techniques.
Aircraft History
The ERCO Ercoupe was the response to a sponsored design competition during the mid-1930s for an easy-to-fly, safe airplane. Designed by Fred Weick and his fellow engineers, the Ercoupe received attention as the first tricycle gear all-metal light airplane that demonstrated spin and stall proof characteristics. The type continues to enjoy a faithful following today.
First flown in 1937, the Ercoupe was designed to be the safest fixed-wing aircraft that aerospace engineering could provide at the time. The unique two-control system linked the rudder and aileron controls, eliminating the need for rudder pedals and making the aircraft nearly foolproof. The aircraft was capable of operations into and out of small airfields, was financially within reach of a large section of the public, and was inexpensive to operate and maintain.
More than 5,600 Ercoupes were built over nearly three decades, with production continuing under several manufacturers. The distinctive twin-tail design and tricycle landing gear made the Ercoupe an instantly recognisable presence on American airfields.
About the Model
Nick Ziroli's design follows traditional giant-scale construction using built-up balsa and plywood structures throughout. The plan set consists of three large sheets that clearly illustrate all structure as well as showing installation of gear struts. The Ercoupe plan shows the installation of Robart gear struts, servos and a Zenoah G-23 engine and features a three-piece wing.
The basic structures use conventional modelling tools and materials such as balsa and plywood, and the techniques are straightforward; easily accomplished by anyone with previous model building experience. The plan includes full-size templates for all the required parts.
Features
- Precision laser-cut balsa and plywood components
- Based on the original Nick Ziroli design
- Traditional built-up construction
- Accurate rib and former profiles
- Three-piece wing for easier transportation
- Designed for retractable or fixed tricycle landing gear
- Scale-faithful twin-tail outlines
- Proven flying characteristics
- Manufactured by Varlocity Laser & Models
Why You'll Love Building It
- Traditional stick-built aeromodelling that's enjoyable from the first rib to final covering.
- A rewarding project for experienced scale builders.
- The distinctive twin-tail and tricycle gear provide an enjoyable and technically interesting build.
- Large scale allows extensive detailing if desired.
- A proven Nick Ziroli design with an excellent reputation among giant-scale builders.
What's Included
- Precision laser-cut balsa wing ribs
- Laser-cut plywood formers
- Laser-cut fuselage components
- Wing ribs
- Tailplane components
- Fin and rudder components
- Lite-ply structural parts
- Additional laser-cut structural components shown on the original plan
Only the precision laser-cut wooden parts are supplied.
What's Required
Mandatory Items
- Original Nick Ziroli plans - Available separately
- Strip wood
- Sheet balsa
- Plywood sheeting where required
- Building board
- Adhesives
- Covering materials
- Hinges
- Control linkages and pushrods
- Landing gear
- Wheels
- Hardware
- Power system
- Radio system
Recommended Accessories (Available Separately)
- Ziroli Ercoupe Cowl
- Aluminum Wing Tube and Sleeve Set - 7/8" x 30"
- Robart Tri-gear struts
- Wheels Main: 3.25", Wheel Nose: 2.75"
- 16 oz square fuel tank
- 2" spinner
Verified Specifications
| Specification | Value |
|---|
| Designer | Nick Ziroli |
| Aircraft | ERCO Ercoupe |
| Scale | 1/4.5 (2.66 in = 1 ft) |
| Wingspan | 80 in (2032 mm) |
| Length | 53 in (1346 mm) |
| Wing Area | 900 sq in |
| Wing Loading | 41 oz/sq ft |
| Power Type | 26cc gasoline engine |
| Construction | Balsa and plywood |
| Wing Configuration | Three-piece wing |
| Wing Incidence at Root | +2.5 degrees |
| Stab Incidence | 0 degrees |
| CG Location | 3.5 in behind leading edge of wing |
| Difficulty | Experienced builder |
Recommended Equipment
- 1 × 26cc gasoline engine
- 2" spinner
- 4 radio channels
- Servos: Ailerons (2) 70+ oz-in BB, Elevators (1) 70+ oz-in BB, Rudder (1) 70+ oz-in BB, Throttle (1) 50 oz-in BB
- Robart Tri-gear struts
- 16 oz square fuel tank
- 7/8" x 30" wing tube
These recommendations are based on the original design documentation and common giant-scale building practice. Builders may select equivalent modern equipment to suit their preferences.
Builder Notes
- Recommended for experienced builders familiar with large traditional models.
- If you choose gear or an engine not shown on the plans, have them on hand when you start construction to make any changes needed for mounting.
- Study the plans carefully before starting to build.
- Consider adding gussets to high-stress joints.
- Dry-fit major assemblies before gluing.
- Maintain accurate alignment throughout construction, paying particular attention to the twin-tail assembly.
- Keep the tail structure as light as practical.
- Balance the completed aircraft carefully using the published centre of gravity.
Historical Information
Manufacturer: Engineering and Research Corporation (ERCO)
Country: United States
First Flight: 1937
The ERCO Ercoupe was designed as the safest fixed-wing aircraft that aerospace engineering could provide at the time. It was the first aircraft certified by the Civil Aeronautics Administration as "characteristically incapable of spinning." The type continues to enjoy a very faithful following today, with pilots appreciating its unique two-control system and benign handling characteristics.
Several companies built nearly 6,000 Ercoupes or their variants over a period of nearly 30 years. The aircraft was aggressively marketed through unconventional outlets such as the men's department of the Macy's department store chain.
Frequently Asked Questions
- Does this kit include the plans?
No. The original Nick Ziroli plans are required separately and are available from ziroligiantscaleplans.com. - Is hardware included?
No. This is a laser-cut short kit only. - Is this suitable for beginners?
Previous experience with traditional balsa construction is recommended. - Can I install retractable gear?
Yes. The original design incorporates retractable landing gear provisions. - Can additional scale detailing be added?
Yes. The large scale provides excellent opportunities for additional detailing. - Can modern radio equipment be used?
Yes. Modern giant-scale radio systems are entirely suitable. - Does the kit include strip wood?
No. Strip wood and sheeting must be supplied by the builder. - What covering is recommended?
Covering the fuselage with 1 oz fibreglass cloth and finishing resin, and the wings, elevator and rudder with iron-on cloth covering is a proven approach for this design.
Safety & Disclaimer
This product is a precision laser-cut short kit. Strip wood, hardware, covering materials, adhesives, electronics, power system and building supplies are not included unless specifically stated. Builder experience is recommended. Power system recommendations are suggestions only and should be selected to suit the completed aircraft and intended flying style. All specifications are based on the original Nick Ziroli design documentation and are subject to builder interpretation.
