The JPX D-320 and D330 are a family of
French
French (french: français(e), link=no) may refer to:
* Something of, from, or related to France
** French language, which originated in France, and its various dialects and accents
** French people, a nation and ethnic group identified with Franc ...
twin-cylinder,
horizontally opposed
A flat engine is a piston engine where the cylinders are located on either side of a central crankshaft. Flat engines are also known as horizontally opposed engines, however this is distinct from the less common opposed-piston engine design, wh ...
,
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of ...
aircraft engines.
[Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-4 Cybair Limited Publishing, 2001. ]
The engine was introduced specifically for the
powered paraglider
Powered paragliding, also known as paramotoring or PPG, is a form of ultralight aviation where the pilot wears a back-pack motor (a paramotor) which provides enough thrust to take off using a paraglider. It can be launched in still air, and ...
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
Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles, lawn mowers, chainsaws, small engines, turbine-powered aircraft, and some cars. It ...
. Fuel is metered by a single Tillotson
carburetor
A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meteri ...
. Starting is only by electric start, without
recoil start
Rope start (also called pull start or ''rewind start'') is a method of starting an internal combustion engine, usually on small machines, such as lawn mowers, chainsaws, ultralight aircraft, small outboard motors and portable engine-generators. A ...
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 gives the engine a high
power-to-weight ratio
Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measuremen ...
.
Variants
;D-320
:Twin-cylinder, horizontally opposed aircraft engine introduced in the mid-1990s and currently out of production. Power output is at 6600 rpm.
;D330
:Twin-cylinder, horizontally opposed aircraft engine, improved variant, currently in production. Power output is at 6500 rpm.
Applications
*
Alpaero Exel
*
Alpaero Sirius
*
Bailey JPX D330
*
D'Yves Yvasion 2000
*
Ekolot JK 01A Elf
*
Reflex J 320
*
Technic'air Fly Roller
Specifications (D330)
See also
References
{{JPX
Air-cooled aircraft piston engines
Two-stroke aircraft piston engines