The Lorraine 9N Algol was a French 9-cylinder radial
aeroengine built and used in the 1930s. It was rated at up to , but more usually in the range.
Design and development
The Algol was a conventionally laid out
radial engine, with nine cylinders in a single row. The
crankcase
In a piston engine, the crankcase is the housing 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, resulting in the fuel/a ...
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
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines.
All comp ...
, 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 at
Applications
*
ANF Les Mureaux 120
The ANF Les Mureaux 120 was a 1930s French three-seat military night reconnaissance monoplane built by ANF Les Mureaux.
Design and development
The 120 was designed to meet a 1928 French Aéronautique Militaire requirement for a three-seat nigh ...
*
Bernard 161
*
Bloch 120
The Bloch MB.120 was a French three-engine colonial transport aircraft built by Société des Avions Marcel Bloch during the 1930s.
Design and development
The MB.120 design was selected by the French government for transport use in French overse ...
*
Bloch MB.500
The Bloch MB.500 was a French low-wing monoplane trainer developed by ''Société des Avions Marcel Bloch
The Société des Avions Marcel Bloch was a French Aerospace manufacturer, aircraft manufacturer of military and civilian aircraft. It ...
*
Caudron C.180
The Caudron C.180 was an all-metal, three-engine French ten-seat passenger aircraft, flown about 1930. Only one was built.
Design and development
The Caudron C.180 was a high-wing cantilever monoplane with metal structure and duraluminium cover ...
*
FBA 290
*
Loire 11
*
Potez 33
*
Potez 40
The Potez 40 was a French three-engine, braced high-wing monoplane designed and built in response to a French government programme for colonial transport and policing aircraft duties.
Design and development
The Potez 40 was an all-metal aircraft ...
*
PWS-24
*
Romano R.16
The Romano R.16 was a three engine, high wing monoplane designed for policing and other rôles in France's African colonies.
Design
In 1930 the ''Direection Générale Technique'' issued a programme for an aircraft to operate in the French Col ...
*
SAB-SEMA 12
The SAB-SEMA 10 was a single-engine advanced trainer, designed and built in France as the SEMA 10, in the 1930s. It failed to win a French production contract and only one was built. Re-engined, modified and redesignated SAB-SEMA 12, it served ...
*
Lorraine-Hanriot LH.70
The Lorraine-Hanriot LH.70 or S.A.B. LH.70 was a French trimotor designed to a 1930 government programme for a colonial policing aircraft. Only two were built.
Design
The LH.70 was entirely conceived and directed by the Société Aérienne Bord ...
*
Weymann 66
Specifications
References
{{Lorraine aeroengines
1930s aircraft piston engines
Aircraft air-cooled radial piston engines
Algol