König SD 570
{{Short description|Four-cylinder, two-stroke, single ignition radial aircraft engine}}
{{Use dmy dates|date=November 2021}}
{{Use Canadian English|date=November 2021}}
| {{Infobox Aircraft Begin
| name=König SD 570 | image= | caption= }}{{Infobox Aircraft Engine |type= Two-stroke aircraft engine |manufacturer=Dieter König |national origin=Germany |first run= |major applications= |produced= |number built= |developed from= |variants with their own articles= }} |
The König SD 570 is a four-cylinder, two-stroke, single ignition radial aircraft engine designed for powered paragliders, powered parachutes and single place ultralight trikes.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-6 Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}{{cite web|url = http://www.compactradialengines.com/mz570.html|title = SD-570, 4 cylinders 2 stroke; direct drive|accessdate = 2010-01-22|last = Compact Radial Engines Inc|authorlink = |year = 2009|archive-url= https://web.archive.org/web/20131016011144/http://www.compactradialengines.com/mz570.html|archive-date= 16 October 2013|url-status=dead}}
The engine was originally designed and produced by Dieter König of Berlin, Germany. The design was sold to Zanzottera Technologies of Italy 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, Canada. Compact Radial Engines was then in turn acquired by Fiate Aviation Co., Ltd. of Hefei, Anhui, China in August 2017. Fiate Aviation did not advertise the engine as available in 2021.{{cite web|url= http://www.fiate.net/en/|title= Fiate Aviation|access-date= 23 November 2021|author= Fiate Aviation|work= fiate.net|year= 2018|archive-url= https://web.archive.org/web/20210608204753/http://www.fiate.net/en/|archive-date= 8 June 2021|url-status= live}}
Development
The SD 570 is an unusual four-cylinder radial engine that is very compact and light weight at only {{convert|19|kg|lb|0|abbr=on}}. The engine features single capacitor discharge ignition, 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 is not an option.Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 73. BAI Communications. {{ISBN|0-9636409-4-1}}
Earlier versions produced {{convert|28|hp|kW|0|abbr=on}} at 4200 rpm with a slide-type carburetor and reduction drive. The Compact Radial Engines version is rated at {{convert|24|hp|kW|0|abbr=on}} at 4200 rpm. Time between overhaul is rated as 300 hours.
The SD 570 shares the same bore and stroke as the smaller three-cylinder König SC 430 radial engine.
Variants
;Zanzottera SD 570
:Four-cylinder, two-stroke, single-ignition, radial aircraft engine producing {{convert|28|hp|kW|0|abbr=on}} 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 {{convert|24|hp|kW|0|abbr=on}} at 4200 rpm. Equipped with a Bing 49 diaphragm-type carburetor and no reduction drive.
Applications
Specifications (CD 570)
{{pistonspecs|
|type=Four-cylinder, radial two-stroke aircraft engine
|bore={{convert|66|mm|in|2|abbr=on}}
|stroke={{convert|42|mm|in|2|abbr=on}}
|displacement=579 cc (35.33 cu in)
|length=
|diameter=
|width=
|height=
|weight={{convert|19|kg|lb|0|abbr=on}}
|valvetrain=rotary valve induction
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=
|oilsystem=premixed oil and fuel
|coolingsystem=air-cooled
|power={{convert|24|hp|kW|0|abbr=on}} at 4200 rpm
|specpower=
|compression=
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
|designer=
|reduction_gear=none
|general_other=
|components_other=
|performance_other=
}}
See also
References
{{Reflist}}
{{Zanzottera}}
{{DEFAULTSORT:Konig Sd 570}}
Category:Compact Radial Engines aircraft engines
Category:Zanzottera aircraft engines
Category:Air-cooled aircraft piston engines