The König SD 570 is a four-cylinder,
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a Thermodynamic power cycle, power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being comple ...
, single ignition
radial
Radial is a geometric term of location which may refer to:
Mathematics and Direction
* Vector (geometric)
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) ...
aircraft engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years many ...
designed for
powered paragliders,
powered parachute
A powered parachute, often abbreviated PPC, and also called a motorized parachute or paraplane, is a type of aircraft that consists of a parafoil with a motor and wheels.
The FAA defines a powered parachute as ''a powered aircraft a flexible o ...
s and single place
ultralight trike
An ultralight trike is a type of powered hang glider where flight control is by weight-shift. These aircraft have a fabric flex-wing from which is suspended a tricycle fuselage pod driven by a pusher propeller. The pod accommodates either a so ...
s.
[Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-6 Cybair Limited Publishing, 2001. ]
The engine was originally designed and produced by
Dieter König
Dieter König (19 May 1931 – 17 August 1991) raced hydroplanes and was also responsible for manufacturing the engines that powered them. During the 1960s, 1970s and 1980s his "König" engines dominated the sport.
The engines were manufactured in ...
of
Berlin
Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constitue ...
,
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
. The design was sold to Zanzottera Technologies of
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
and then sold again, along with the rest of Zanzottera's two-stroke ultralight aircraft engine line to Compact Radial Engines of
Surrey, British Columbia
Surrey is a city in British Columbia, Canada. It is located south of the Fraser River on the Canada–United States border. It is a member municipality of the Metro Vancouver regional district and metropolitan area. Mainly a suburban city, Surr ...
,
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
.
Compact Radial Engines was then in turn acquired by Fiate Aviation Co., Ltd. of
Hefei, Anhui,
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
in August 2017. Fiate Aviation did not advertise the engine as available in 2021.
Development
The SD 570 is an unusual four-cylinder radial engine that is very compact and light weight at only . The engine features single
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 w ...
, a single Bing 49 diaphragm-type carburetor and rotary valve induction. Compact Radial Engines offered it without a reduction drive, although when Zanzottera built it an optional 1.75:1 cog belt reduction drive was available. Starting is electric starter only and a
recoil starter
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 ...
is not an option.
[Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 73. BAI Communications. ]
Earlier versions produced at 4200 rpm with a slide-type carburetor and reduction drive. The Compact Radial Engines version is rated at at 4200 rpm.
Time between overhaul
Time between overhauls (abbreviated as TBO or TBOH) is the manufacturer's recommended number of running hours or calendar time before an aircraft engine or other component requires overhaul.
On rotorcraft, many components have recommended or man ...
is rated as 300 hours.
The SD 570 shares the same bore and stroke as the smaller three-cylinder
König SC 430
The König SC 430 is a three-cylinder, two-stroke, single ignition radial aircraft engine designed for powered paragliders and single place ultralight trikes.Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-5 Cybair L ...
radial engine.
Variants
;Zanzottera SD 570
:Four-cylinder, two-stroke, single-ignition, radial aircraft engine producing at 4200 rpm. Equipped with a slide-type carburetor and an optional reduction drive.
;Compact Radial Engines SD 570
:Four-cylinder, two-stroke, single-ignition, radial aircraft engine producing at 4200 rpm. Equipped with a Bing 49 diaphragm-type carburetor and no reduction drive.
Applications
*
AMF Chevvron 2-32
The AMF Chevvron is a British two-seat microlight aircraft of the 1980s and 90s. It is a single engined mid-winged monoplane with side-by-side seating. 41 were built.
Design and development
The Chevvron was designed to meet a requirement for an ...
*
MFI BA-12 Sländan
The MFI BA-12 Sländan is a single seat ultralight of pod and high boom configuration and with a butterfly tail. It was designed and built in Sweden in the 1980s and led to a two-seat, slightly larger, development called the BA-14.
Design and ...
*
Ligeti Stratos
Specifications (CD 570)
See also
References
{{DEFAULTSORT:Konig Sd 570
Compact Radial Engines aircraft engines
Zanzottera aircraft engines
Air-cooled aircraft piston engines
Two-stroke aircraft piston engines
Radial engines