# Apex Eco 6

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Apex Eco 6 General information Type Ultralight trike National origin Czech Republic Manufacturer To-Mi Aviation Apex Aviation Status Production completed

The **Apex Eco 6** is the first of a family of [Czech](/source/Czech_Republic) single and two seat [flying wing](/source/Flying_wing) [ultralight trikes](/source/Ultralight_trike) that were designed and produced by [To-Mi Aviation](https://en.wikipedia.org/w/index.php?title=To-Mi_Aviation&action=edit&redlink=1) and later by [Apex Aviation](https://en.wikipedia.org/w/index.php?title=Apex_Aviation_(Czech_company)&action=edit&redlink=1). The aircraft were supplied as kits for [amateur construction](/source/Homebuilt_aircraft).[1][2][3][4]

## Design and development

The single seat Eco 6 was designed to comply with the US [FAR 103 Ultralight Vehicles](/source/FAR_103_Ultralight_Vehicles) rules, including the category's maximum empty weight of 254 lb (115 kg). It features a [cable-braced](/source/Flying_wires) [hang glider](/source/Hang_glider)-style [high-wing](/source/High-wing), weight-shift controls, a single-seat, open cockpit, [tricycle landing gear](/source/Tricycle_landing_gear) and a single engine in [pusher configuration](/source/Pusher_configuration).[1]

The aircraft is made from bolted-together [aluminum](/source/Aluminum) tubing with steel brackets, with its single surface wing covered in [Dacron](/source/Dacron) sailcloth. Its 9.60 m (31.5 ft) span wing is supported by a single tube-type [kingpost](/source/Kingpost) and uses an "A" frame control bar. A variety of single-surfaced wings can be used on the Eco 6, with wing areas ranging from 14.0 to 16.1 m2 (151 to 173 sq ft). The Eco 6 had a factory option of a Galaxy [ballistic parachute](/source/Ballistic_parachute). The standard engine supplied was the 30 kW (40 hp) [Rotax 447](/source/Rotax_447).[1]

Developed from the Eco 6 were two two-seat models, the Dolphin 3 and the Cross 5. The three aircraft line commenced production in the mid-1980s and was introduced into the [United States](/source/United_States) in 1997, represented in the US by AKS of [Portland, Oregon](/source/Portland%2C_Oregon).[1]

## Operational history

The Cross 5 model was supplied to the [Czech Air Force](/source/Czech_Air_Force).[2]

## Variants

**Eco 6**
- Single-seat model with a [Rotax 447](/source/Rotax_447) engine of 30 kW (40 hp) or a [Rotax 503](/source/Rotax_503) engine of 37 kW (50 hp). Acceptable power range is 34 to 48 kW (46 to 64 hp). Fifteen had been completed and flown by February 2000.[1][2]

**Dolphin 3**
- Two-seat [tandem](/source/Tandem) model with a useful load of 319 kg (703 lb), powered by a [Rotax 503](/source/Rotax_503) engine of 37 kW (50 hp), a 48 kW (64 hp) [Rotax 582](/source/Rotax_582) or [SVS-1400](https://en.wikipedia.org/w/index.php?title=SVS-1400&action=edit&redlink=1) engine[1][4]

**Cross 5**
- Two-seat tandem model with a steel tube frame and a gross weight of 450 kg (992 lb). Can accept any engine under 75 kg (165 lb) in weight, including the 45 kW (60 hp) [Zanzottera MZ 201](/source/Zanzottera_MZ_201). Fifteen had been completed and flown by February 2000. Construction time from the kit was reported as 100 hours.[1][2][3]

**Cross 5x**
- Version of the Cross 5 with higher and wider seats[4]

## Specifications (Eco 6)

*Data from* Cliche and Kitplanes[1][2]

**General characteristics**

- **Crew:** one

- **Length:** 1.98 m (6 ft 6 in)

- **Wingspan:** 9.60 m (31 ft 6 in)

- **Height:** 2.4 m (8 ft)

- **Wing area:** 15 m2 (160 sq ft) typical wing fitted

- **Empty weight:** 32 kg (70.5 lb) plus wing and engine

- **Gross weight:** 215 kg (475 lb)

- **Fuel capacity:** 17 litres (3.7 imp gal; 4.5 US gal)

- **Powerplant:** 1 × [Rotax 503](/source/Rotax_503) twin cylinder, [two-stroke](/source/Two-stroke) aircraft engine, 37 kW (50 hp)

**Performance**

- **Cruise speed:** 56 km/h (35 mph, 30 kn)

- **Range:** 140 km (90 mi, 78 nmi)

- **Rate of climb:** 4.8 m/s (950 ft/min)

## References

1. ^ [***a***](#cite_ref-Cliche_1-0) [***b***](#cite_ref-Cliche_1-1) [***c***](#cite_ref-Cliche_1-2) [***d***](#cite_ref-Cliche_1-3) [***e***](#cite_ref-Cliche_1-4) [***f***](#cite_ref-Cliche_1-5) [***g***](#cite_ref-Cliche_1-6) [***h***](#cite_ref-Cliche_1-7) Cliche, Andre: *Ultralight Aircraft Shopper's Guide* 8th Edition, page C-5. Cybair Limited Publishing, 2001. [ISBN](/source/ISBN_(identifier)) [0-9680628-1-4](https://en.wikipedia.org/wiki/Special:BookSources/0-9680628-1-4)

1. ^ [***a***](#cite_ref-KitplanesFeb2000_2-0) [***b***](#cite_ref-KitplanesFeb2000_2-1) [***c***](#cite_ref-KitplanesFeb2000_2-2) [***d***](#cite_ref-KitplanesFeb2000_2-3) [***e***](#cite_ref-KitplanesFeb2000_2-4) Downey, Julia: *2000 Trike and 'Chute Directory*, Kitplanes, Volume 17, Number 2, February 2000, page 45. Kitplanes Acquisition Company. ISSN 0891-1851

1. ^ [***a***](#cite_ref-KitplanesFeb2005_3-0) [***b***](#cite_ref-KitplanesFeb2005_3-1) Downey, Julia: *2005 Trikes 'Chutes and Rotorcraft Directory*, Kitplanes, Volume 22, Number 2, February 2005, page 47. Belvoir Publications. ISSN 0891-1851

1. ^ [***a***](#cite_ref-Aerocrafter_4-0) [***b***](#cite_ref-Aerocrafter_4-1) [***c***](#cite_ref-Aerocrafter_4-2) Purdy, Don: *AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition*, page 276. BAI Communications, 15 July 1998. [ISBN](/source/ISBN_(identifier)) [0-9636409-4-1](https://en.wikipedia.org/wiki/Special:BookSources/0-9636409-4-1)

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Adapted from the Wikipedia article [Apex Eco 6](https://en.wikipedia.org/wiki/Apex_Eco_6) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Apex_Eco_6?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.