The Maybach HL230 was a

water-cooled Cooling tower and water discharge of a nuclear power plant Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...

60° 23

litre The litre ( Commonwealth spelling) or liter ( American spelling) (SI symbols L and l, other symbol used: ℓ) is a metric unit of volume. It is equal to 1 cubic decimetre (dm3), 1000 cubic centimetres (cm3) or 0.001 cubic metres (m3). A ...

V12

petrol engine A petrol engine (gasoline engine in American and Canadian English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends ...

Maybach Maybach (, ) is a German luxury car brand owned by and a part of Mercedes-Benz AG. The original company was founded in 1909 by Wilhelm Maybach and his son Karl Maybach, originally as a subsidiary of ''Luftschiffbau Zeppelin GmbH'', and it was ...

. It was used during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

in medium and heavy

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; ...

s – the Panther,

Jagdpanther The (German: "hunting Panther"), Sd.Kfz. 173, was a tank destroyer (, a self-propelled anti-tank gun) built by Germany during World War II. The combined the 8.8 cm Pak 43 anti-tank gun, similar to the main gun of the Tiger II, with the armor ...

Tiger II The Tiger II was a Nazi Germany, German heavy tank of the World War II, Second World War. The final official German designation was ''Panzerkampfwagen'' Tiger ''Ausf''. B, often shortened to Tiger B.Jentz and Doyle 1993, p. 16. The ordnance inve ...

, Jagdtiger (HL230 P30), and later versions of the

Tiger I The Tiger I () was a Nazi Germany, German heavy tank of World War II that began operational duty in 1942 in North African Campaign, Africa and in the Soviet Union, usually in independent German heavy tank battalion, heavy tank battalions. It g ...

and Sturmtiger (HL230 P45).

Description

The engine was an upgraded version of the slightly smaller HL210 engine which was used to equip the first 250 Tiger I tanks built, and which had an

aluminium Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...

crankcase A crankcase is the housing in a reciprocating engine, piston engine that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically use a crankcase-compression design, res ...

and

block Block or blocked may refer to: Arts, entertainment and media Broadcasting * Block programming, the result of a programming strategy in broadcasting * W242BX, a radio station licensed to Greenville, South Carolina, United States known as ''96.3 ...

. The earlier HL210 engine had a displacement of or 1,779 cm³ per cylinder; bore , stroke . With the HL230, engine bore was increased from 125 mm to 130 mm. It had a displacement of or 1,925 cm³ per cylinder; bore , stroke . The maximum output of 700 PS (690 hp, 515 kW) at 3,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines. One revolution per minute is equivalent to hertz. Standards ISO 80000-3:2019 def ...

. Maximum

torque In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. Wh ...

is 1850 Nm (1364.5 ft lbs) at 2,100 rpm. Typical output was 600 PS (592 hp, 441 kW) at 2,500 rpm. The crankcase and block of the HL230 were made of grey cast iron and the

cylinder head In a piston engine, the cylinder head sits above the cylinders, forming the roof of the combustion chamber. In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern ...

s from

cast iron Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%. Its usefulness derives from its relatively low melting temperature. The alloying elements determine the form in which its car ...

. The engine weighed 1200 kg and its dimensions were . Aspiration was provided by four twin-choke Solex type 52JFF

carburettor A carburetor (also spelled carburettor or carburetter) is a device used by a gasoline 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 Vent ...

s. Ignition was by two magnetos. The compression ratio was 6.8:1. As was typical practice for Maybach, the engine used a tunnel crankshaft. Late in the war the HL234 upgrade with

fuel injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of a fuel injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All c ...

was recommended by the Entwicklungskommission Panzer for use in the underpowered

tank. The power output was expected to increase to between 800 and 900 PS (hp), and with supercharging to 1100 to 1200 hp.

Production

Approximately 9,000 HL230s were produced in total by Maybach,

Auto Union Auto Union AG was an amalgamation of four German automobile manufacturers, founded in 1932 and established in 1936 in Chemnitz, Saxony. It is the immediate predecessor of Audi as it is known today. As well as acting as an umbrella firm for ...

and

Daimler-Benz Mercedes-Benz Group AG (formerly Daimler-Benz, DaimlerChrysler, and Daimler) is a Germany, German Multinational corporation, multinational Automotive industry, automotive company headquartered in Stuttgart, Baden-Württemberg, Germany. It is o ...

. Beginning on 3 November 1944, they were produced at the Richard I underground factory at

Leitmeritz concentration camp Leitmeritz was the largest subcamp of the Flossenbürg concentration camp, operated by Nazi Germany in Leitmeritz, Reichsgau Sudetenland (now Litoměřice, Czech Republic). Established on 24 March 1944 as part of an effort to disperse and ...

References

External links

Copy of British report on the HL230 and HL210 engines
- Tiger I Information Center
Detailed picture gallery of HL230 Tiger engine overhaul
- Armytech.com *{{Cite web , title=French Army studies of captured equipment (1945) - general arrangement drawings, HL230 P30 , url=http://www.servicehistorique.sga.defense.gouv.fr/02fonds-collections/banquedocuments/materiel_armement/fiche.php?id=183 , publisher= Defence Historical Service , format=TIFF , archive-url=https://web.archive.org/web/20071216103335/http://www.servicehistorique.sga.defense.gouv.fr/02fonds-collections/banquedocuments/materiel_armement/fiche.php?id=183 , archive-date=16 December 2007 , url-status=dead Tank engines HL230 Gasoline engines by model V12 engines

Description

Production

See also

References

External links