To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

Lorraine Algol

From Wikipedia, the free encyclopedia

Type 9-cylinder air-cooled radial aircraft engine
National origin France
Manufacturer Société Lorraine, Argenteuil, Paris
Major applications Bloch 120
Variants 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 370 kW (500 hp), but more usually in the 220–300 kW (300–400 hp) 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.[1]

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.[1]

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.[1]

Most Algols were conventionally aspirated via a single carburetter[1] 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.[2]


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 (370 kW) at 3,000 m (9,800 ft)[3]



Data from Jane's All the World's Aircraft 1938[1]

General characteristics

  • Type: 9-cylinder single row supercharged radial
  • Bore: 140 mm (5.51 in)
  • Stroke: 150 mm (5.90 in)
  • Displacement: 20.78 L (1,268 cu in)
  • Length: 1.347 m (53.2 in)
  • Diameter: 1.275 m (50.2 in)
  • Dry weight: complete 390 kg (860 lb)


  • Valvetrain: one inlet and one exhaust overhead valve per cylinder, operated with rocker arms, pushrod driven via roller tappets bearing on a double track cam-ring
  • Fuel system: single Stromberg carburettor, heated by exhaust
  • Fuel type: petrol
  • Cooling system: air-cooled
  • Reduction gear: 11:17



  1. ^ a b c d e Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. pp. 48d–49d. ISBN 0-7153-5734-4.
  2. ^ "To Paris". Flight. No. 8 December 1938. p. 534.
  3. ^ Société Nationale de Constructions de Moteurs: Argentuil (in French). Argentuil: SNCM. November 1938. Archived from the original on 16 October 2014. Retrieved 11 October 2014.
  4. ^ Parmentier, Bruno. "Sema 12". Aviafrance. Retrieved 14 October 2012.
This page was last edited on 29 November 2020, at 15:55
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.