König SD 570
| Company type | Aircraft engine |
|---|---|
| Industry | Aerospace |
| Founder | Dieter König |
| Headquarters | Berlin , Germany |
| Products | Four-cylinder two-stroke radial aircraft engine |
The König SD 570 is a compact, four-cylinder radial engine operating on a two-stroke cycle with a single ignition system, primarily intended for use in powered paragliders, powered parachutes, and single-seat ultralight trike aircraft.[1] [2]
Originally engineered and manufactured by Dieter König in Berlin, Germany, the design was subsequently transferred to Zanzottera Technologies based in Italy. Later, the entire two-stroke ultralight aircraft engine lineup from Zanzottera, including the SD 570, was acquired by Compact Radial Engines located in Surrey, British Columbia, Canada.[1][2] In August 2017, Fiate Aviation Co., Ltd., headquartered in Hefei, Anhui, China, took over Compact Radial Engines. As of 2021, Fiate Aviation did not list this engine as part of their available products.[3]
Development
The SD 570 stands out as a lightweight and compact four-cylinder radial powerplant, weighing just 19 kg (42 lb). It incorporates a single capacitor discharge ignition system and utilizes a Bing 49 diaphragm-type carburetor paired with rotary valve induction. While Compact Radial Engines supplied the model without a reduction drive, an optional cog belt reduction drive with a 1.75:1 ratio was offered during Zanzottera's production period. The engine relies exclusively on an electric starter; no recoil start option is provided.[1][2][4]
Earlier iterations of this engine delivered 28 hp (21 kW) at 4200 rpm using a slide-type carburetor combined with a reduction drive. The version produced by Compact Radial Engines is rated at 24 hp (18 kW) at the same rpm. The recommended time between overhauls (TBO) is specified as 300 hours.[1][2][4]
The SD 570 shares its bore and stroke dimensions with the smaller three-cylinder König SC 430 radial engine.[2][4]
Variants
- Zanzottera SD 570
- A radial aircraft engine featuring four cylinders, operating on a two-stroke cycle with single ignition, delivering 28 hp (21 kW) at 4200 rpm. It includes a slide-type carburetor and offers an optional reduction gearbox.
- Compact Radial Engines SD 570
- This four-cylinder, two-stroke radial engine with single ignition generates 24 hp (18 kW) at 4200 rpm. It is fitted with a Bing 49 diaphragm-style carburetor and does not incorporate a reduction drive.
Applications
Specifications (CD 570)
See also
References
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