Dynali H2S

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 or fully assembled, supplied ready-to-fly.

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

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, 165 to 185 hp 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 7.22 m diameter two-bladed rotor has a chord of 20 cm 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 465 kg and a gross weight of 700 kg, giving a useful load of 235 kg. With full fuel of 80 L the payload is 177 kg.

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 700 kg, powered by a four cylinder, air-cooled, four-stroke, 165 to 185 hp Subaru EJ25 automotive conversion engine.


 * Dynali H3 EasyFlyer
 * Lightened version powered by a four cylinder, air and liquid-cooled, four-stroke, dual ignition 100 hp Rotax 912S or a turbocharged 115 hp Rotax 914 engine for the light-sport aircraft category.