Verner Scarlett 7H

Last updated

Scarlett 7H
Type Aircraft engine
National origin Czech Republic
Manufacturer Verner Motor
Unit cost €13,800 (2015)

The Verner Scarlett 7H is a Czech aircraft radial engine, designed and produced by Verner Motor of Šumperk for use in ultralight and homebuilt aircraft. [1]

Czech Republic Republic in Central Europe

The Czech Republic, also known by its short-form name, Czechia, is a landlocked country in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast. The Czech Republic covers an area of 78,866 square kilometres (30,450 sq mi) with a mostly temperate continental climate and oceanic climate. It is a unitary parliamentary republic, with 10.6 million inhabitants; its capital and largest city is Prague, with 1.3 million residents. Other major cities are Brno, Ostrava, Olomouc and Pilsen. The Czech Republic is a member of the European Union (EU), NATO, the OECD, the United Nations, the OSCE, and the Council of Europe.

Radial engine reciprocating engine with cylinders arranged radially from a single crankshaft

The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is called a "star engine" in some languages. The radial configuration was commonly used for aircraft engines before gas turbine engines became predominant.

Verner Motor

Verner Motor is a Czech aircraft engine manufacturer based in Šumperk. The company specializes in the design and manufacture of piston engines for homebuilt and ultralight aircraft.

Contents

By April 2018 the engine was no longer advertised on the company website and seems to be out of production. [2]

Design and development

The engine is a four-stroke, seven-cylinder radial, 4,386 cc (267.7 cu in) displacement, air-cooled, direct-drive, gasoline engine design. It employs electronic ignition and produces 117 hp (87 kW) at 2300 rpm, with a compression ratio of 7.3:1. [1]

Compression ratio the ratio of the volume of a combustion chamber from its largest capacity to its smallest capacity

The static compression ratio,, of an internal combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity. It is a fundamental specification for many common combustion engines.

Specifications (Scarlett 7H)

Data from Tacke [1]

General characteristics

Components

  • Fuel type: gasoline, minimum of 95 octane
  • Cooling system: air
  • Reduction gear: none
Propeller speed reduction unit

A propeller speed reduction unit is a gearbox or a belt and pulley device used to reduce the output revolutions per minute (rpm) from the higher input rpm of the powerplant. This allows the use of small displacement internal combustion automotive engines to turn aircraft propellers within an efficient speed range.

Performance

See also

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References

  1. 1 2 3 Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, pages 262-263. Flying Pages Europe SARL, 2015. ISSN   1368-485X
  2. ↑ Verner Motor. "Verner Motor". www.vernermotor.com. Retrieved 25 April 2018.
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