# Airkraft Sunny

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Swiss ultralight aircraft

Sunny Sunny Sport General information Type Ultralight aircraft National origin Switzerland Manufacturer Tandem Aircraft KG Dewald Leichtflugzeugbau Gmbh Airkraft Gmbh Leichtflugzeugbau Designer Dieter Schulz Status Production completed Number built 250

The **Airkraft Sunny** is an [ultralight aircraft](/source/Ultralight_aircraft) that was designed by Dieter Schulz. The aircraft was initially produced by his company, [Tandem Aircraft KG](https://en.wikipedia.org/w/index.php?title=Tandem_Aircraft_KG&action=edit&redlink=1) of [Saulgau](/source/Saulgau), [Germany](/source/Germany), which built about 150 examples between 1989 and 1999. After he sold the rights in 1999, it was then produced by [Dewald Leichtflugzeugbau Gmbh](https://en.wikipedia.org/w/index.php?title=Dewald_Leichtflugzeugbau_Gmbh&action=edit&redlink=1) of [Bad Schönborn](/source/Bad_Sch%C3%B6nborn), [Germany](/source/Germany) and more recently by [Airkraft Gmbh Leichtflugzeugbau](https://en.wikipedia.org/w/index.php?title=Airkraft_Gmbh_Leichtflugzeugbau&action=edit&redlink=1) of [Beringen, Switzerland](/source/Beringen%2C_Switzerland), who seem to have gone out of business in about 2010 and production ended. Originally supplied ready-to-fly, later the aircraft was supplied as a kit for [amateur construction](/source/Homebuilt_aircraft) or as a complete ready-to-fly-aircraft.[1][2][3][4][5][6]

## Design and development

The aircraft complies with the [Fédération Aéronautique Internationale](/source/F%C3%A9d%C3%A9ration_A%C3%A9ronautique_Internationale) microlight category rules. It features an unusual diamond-shaped [biplane](/source/Biplane), [strut-braced](/source/Strut-braced) [closed wing](/source/Closed_wing) layout, a two-seats-in-[tandem](/source/Tandem) enclosed or open cockpit, fixed [tricycle landing gear](/source/Tricycle_landing_gear) and a single engine in [pusher configuration](/source/Pusher_configuration). The upper wing is swept back, while the lower wing is straight, but mounted further aft. The two wings are joined by swept tip [rudders](/source/Rudder). The [elevons](/source/Elevon) are mounted to the lower wing only.[1][3]

The aircraft is made from bolted-together [aluminium](/source/Aluminium) tubing, with its flying surfaces covered in [Dacron](/source/Dacron) sailcloth. Standard engines available include many models of [Hirth](/source/Hirth), [Rotax](/source/Rotax), [BMW](/source/BMW) and [Verner 133M](/source/Verner_133M) powerplants, ranging from 65 to 80 hp (48 to 60 kW).[1][3]

## Variants

Sunny side-by-side

**Sunny Light**
- Version with open cockpit[1][3]

**Sunny Sport**
- Two seat [tandem](/source/Tandem) version with enclosed or semi-enclosed cockpit[1][3][2][5]

**Sunny Side-By-Side**
- Version with [side-by-side configuration](/source/Side-by-side_configuration) seats[5]

**Sunny Targa**
- Fully enclosed version.[5]

**Sunny Amphibian**
- Version with amphibious floats[1][3]

## Specifications (Sunny Light)

*Data from* Bayerl[1]

**General characteristics**

- **Crew:** one

- **Capacity:** one passenger

- **Wingspan:** 7 m (23 ft 0 in)

- **Wing area:** 17 m2 (180 sq ft)

- **Empty weight:** 220 kg (485 lb)

- **Gross weight:** 450 kg (992 lb)

- **Fuel capacity:** 44 litres (9.7 imp gal; 12 US gal) or optionally 80 litres (18 imp gal; 21 US gal)

- **Powerplant:** 1 × [Rotax 582](/source/Rotax_582) twin cylinder, liquid-cooled, [two stroke](/source/Two_stroke), 48 kW (64 hp)

**Performance**

- **Maximum speed:** 145 km/h (90 mph, 78 kn)

- **Cruise speed:** 100 km/h (62 mph, 54 kn)

- **Stall speed:** 55 km/h (34 mph, 30 kn)

- **Rate of climb:** 4 m/s (790 ft/min)

## References

1. ^ [***a***](#cite_ref-WDLA11_1-0) [***b***](#cite_ref-WDLA11_1-1) [***c***](#cite_ref-WDLA11_1-2) [***d***](#cite_ref-WDLA11_1-3) [***e***](#cite_ref-WDLA11_1-4) [***f***](#cite_ref-WDLA11_1-5) [***g***](#cite_ref-WDLA11_1-6) Bayerl, Robby; Martin Berkemeier; et al: *World Directory of Leisure Aviation 2011-12*, page 23. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X

1. ^ [***a***](#cite_ref-WDLA04_2-0) [***b***](#cite_ref-WDLA04_2-1) Bertrand, Noel; Rene Coulon; et al: *World Directory of Leisure Aviation 2003-04*, page 135. Pagefast Ltd, Lancaster UK, 2003. ISSN 1368-485X

1. ^ [***a***](#cite_ref-WDLA15_3-0) [***b***](#cite_ref-WDLA15_3-1) [***c***](#cite_ref-WDLA15_3-2) [***d***](#cite_ref-WDLA15_3-3) [***e***](#cite_ref-WDLA15_3-4) [***f***](#cite_ref-WDLA15_3-5) Tacke, Willi; Marino Boric; et al: *World Directory of Light Aviation 2015-16*, page 23. Flying Pages Europe SARL, 2015. [ISSN](/source/ISSN_(identifier)) [1368-485X](https://search.worldcat.org/issn/1368-485X)

1. **[^](#cite_ref-Aerocrafter_4-0)** Purdy, Don: *AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition*, page 266. BAI Communications, 15 July 1998. [ISBN](/source/ISBN_(identifier)) [0-9636409-4-1](https://en.wikipedia.org/wiki/Special:BookSources/0-9636409-4-1)

1. ^ [***a***](#cite_ref-Schulz_5-0) [***b***](#cite_ref-Schulz_5-1) [***c***](#cite_ref-Schulz_5-2) [***d***](#cite_ref-Schulz_5-3) Schulz, Dieter. ["The complete history of the Sunny-Boxwing by Tandem Aircraft KG"](http://www.sunny-boxwing.de/1985-1999%20neu.html). *www.sunny-boxwing.de*. Retrieved 24 April 2018.

1. **[^](#cite_ref-6)** ["Airkraft"](https://web.archive.org/web/*/http://www.airkraft-gmbh.com/). *Internet Archive Wayback Machine*. Retrieved 24 April 2018.

## External links

Wikimedia Commons has media related to [Airkraft Sunny](https://commons.wikimedia.org/wiki/Category:Airkraft_Sunny).

- [Official website](http://www.airkraft-gmbh.com/)

- [Official website archive](https://web.archive.org/web/20100615004247/http://www.airkraft-gmbh.com/) on [Archive.org](/source/Archive.org)

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