JPX D 320

Updated on Dec 19, 2024

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The JPX D-320 and D330 are a family of French twin-cylinder, horizontally opposed, two-stroke aircraft engines.

The engine was introduced specifically for the powered paraglider market, as part of the company's comeback efforts following going out of business in the early 1990s. Production of the engine had ended by 2012.

Design and development

The engine has two cylinders in a horizontally opposed configuration, with cooling fins on the cylinders. The single ignition system uses capacitor discharge ignition. Fuel is metered by a single Tillotson carburetor. Starting is only by electric start, without recoil start as an option.

The D-320 has a redline rpm of 6600 and uses a belt reduction drive of 2.38:1. Its weight of just 36 lb (16 kg) gives the engine a high power-to-weight ratio.

Variants

D-320

Twin-cylinder, horizontally opposed aircraft engine introduced in the mid-1990s and currently out of production. Power output is 20 hp (15 kW) at 6600 rpm.

D330

Twin-cylinder, horizontally opposed aircraft engine, improved variant, currently in production. Power output is 20 hp (15 kW) at 6500 rpm.

Applications

Technic'air Fly Roller

Specifications (D330)

Data from JPX

General characteristics

Type: twin-cylinder, two-stroke engine

Displacement: 319 cc (19.47 cu inches)

Dry weight: 15.5 kg (34 lb) complete with standard reduction drive, carburettor, air filter, electronic ignition, starter motor and exhaust system.

Components

Valvetrain: 6-blade reed valve induction

Fuel system: Tillotson carburetor

Oil system: premixed 2.5% oil and fuel

Cooling system: air cooled

Performance

Power output: 20 hp (15 kW) at 6500 rpm

Compression ratio: 8.5:1

Fuel consumption: 2.5 litres to 6 litres per hour depending on load and cruising speed

References

JPX D-320 Wikipedia

(Text) CC BY-SA

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