Dynali H2S explained

The Dynali H2S is a Belgian helicopter, designed by Jacky Tonet and produced by Dynali of the Thines district of Nivelles. When it was available the aircraft was supplied as a kit for amateur construction[1] or fully assembled, supplied ready-to-fly.[2]

By December 2017 the design was no longer advertised on the company website and production has most likely ended.[3]

Design and development

The H2S was designed to comply with the amateur-built aircraft rules, but a light-sport aircraft category version, the Dynali H3, is also being developed. It features a single main rotor, a two-seats-in side-by-side configuration enclosed cockpit with a windshield, skid-type landing gear and a four-cylinder, liquid cooled four-stroke, 165to Subaru EJ25 automotive conversion engine.

The aircraft fuselage is made from a combination of aluminium tubing and welded stainless steel, covered with a polycarbonate fairing. Its 7.221NaN1 diameter two-bladed rotor has a chord of 201NaN1 and employs composite main rotor blades. The tail rotor is of an enclosed Fenestron type with eight blades. The aircraft has an empty weight of 4650NaN0 and a gross weight of 7000NaN0, giving a useful load of 2350NaN0. With full fuel of the payload is 1770NaN0.

Like many helicopters designed in France and Russia, the main rotor blades advance to the left.

Variants

Kit version
  • Model with a gross weight of 7000NaN0, powered by a four cylinder, air-cooled, four-stroke, 165to Subaru EJ25 automotive conversion engine.
    Dynali H3 EasyFlyer
  • Lightened version powered by a four cylinder, air and liquid-cooled, four-stroke, dual ignition 1000NaN0 Rotax 912S or a turbocharged 1150NaN0 Rotax 914 engine for the light-sport aircraft category.

    Notes and References

    1. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 190. WDLA UK, Lancaster UK, 2011.
    2. Web site: Light helicopters with the lowest cost. 5 March 2014. Dynali Helicopter Company. n.d.. dead. https://web.archive.org/web/20140307061607/http://www.dynali.com/h2s.php. 7 March 2014.
    3. Web site: Ultralight Helicopter Manufacturer. 9 December 2017. Dynali Helicopter Company. www.dynali.com .

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