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Lorraine Algol

1930s French piston aircraft engine

Field	Value
name	Algol
image	Lorraine Algol 9Na.jpg
engine_type	9-cylinder air-cooled radial aircraft engine
manufacturer	Société Lorraine, Argenteuil, Paris
national_origin	France
major_applications	Bloch 120
variants_with_their_own_articles	Lorraine Sirius

The Lorraine 9N Algol was a French 9-cylinder radial aeroengine built and used in the 1930s. It was rated at up to 500 hp, but more usually in the 300 - range.

Design and development

The Algol was a conventionally laid out radial engine, with nine cylinders in a single row. The crankcase was a barrel-shaped aluminium alloy casting, with an internal integral diaphragm which held the front crankshaft bearing. Forward of the diaphragm there was an integrally cast cam-gear case for the double track cam-ring. The reduction gear was housed under a domed casing attached to the front of the crankcase.

Flange-mounted steel barrels were bolted to the crankcase and enclosed with cast aluminium alloy, screwed-on, cylinder head with integral cooling fins. The pistons were also made of aluminium alloy and had floating gudgeon pins. The nine pistons drove the single throw crankshaft via one channel-section master rod and eight circular section auxiliary rods. The master rod had an integral, split type big-end. The crankshaft was machined from a single forging, with bolt-on balance weights.

The Algol had a single pair of overhead inlet and exhaust valves per cylinder. The cam-ring drove roller tappets, mounted in the cam-case, which in turn operated rocker arms, fitted with ball bearings, via pushrods. The cam-ring was concentric with the crankshaft and driven via epicyclic gears.

Most Algols were conventionally aspirated via a single carburetter but at least one 1938 variant used a form of fuel injection, where fuel was blown into the induction system rather than the cylinder head.

Variants

;9A: ;9Ab: ;9Ac: ;9Ad: ;9N Algol: ;9Na Algol: ;9N Algol-Junior ;9N Algol-Major ;9N Algol-Amelioré ;Type 120 500 hp: A developed version with supercharger and reduction gear giving 500 hp at 3000 m

Applications

ANF Les Mureaux 120
Bernard 161
Bloch 120
Bloch MB.500
Caudron C.180
FBA 290
Loire 11
Potez 33
Potez 40
PWS-24
Romano R.16
SAB-SEMA 12
Lorraine-Hanriot LH.70
Weymann 66

Specifications

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References

(November 1938). "Société Nationale de Constructions de Moteurs: Argentuil". SNCM.
Parmentier, Bruno. "Sema 12". Aviafrance.
Grey, C.G.. (1972). "Jane's All the World's Aircraft 1938". David & Charles.
"To Paris".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

lorraine-aircraft-engines 1930s-aircraft-piston-engines aircraft-air-cooled-radial-piston-engines

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