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.
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]
Variantsedit
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 (370 kW) at 3,000 m (9,800 ft)[3]
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
^ (in French). Argentuil: SNCM. November 1938. Archived from the original on 16 October 2014. Retrieved 11 October 2014.
^Parmentier, Bruno. "Sema 12". Aviafrance. Retrieved 14 October 2012.
May 08, 2024
lorraine, algol, lorraine, algol, french, cylinder, radial, aeroengine, built, used, 1930s, rated, more, usually, range, algol, type, cylinder, cooled, radial, aircraft, engine, national, origin, france, manufacturer, société, lorraine, argenteuil, paris, majo. 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 Algol Type 9 cylinder air cooled radial aircraft engine National origin France Manufacturer Societe Lorraine Argenteuil Paris Major applications Bloch 120 Variants Lorraine Sirius Contents 1 Design and development 2 Variants 3 Applications 4 Specifications 4 1 General characteristics 4 2 Components 4 3 Performance 5 ReferencesDesign and development editThe 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 Variants edit9A 9Ab 9Ac 9Ad 9N Algol 9Na Algol 9N Algol Junior 9N Algol Major 9N Algol Ameliore 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 Applications editANF 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 66Specifications editData 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 Components 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 Performance Power output rated 221 kW 296 hp 4 Compression ratio 6 1References edit a b c d e Grey C G 1972 Jane s All the World s Aircraft 1938 London David amp Charles pp 48d 49d ISBN 0 7153 5734 4 To Paris Flight No 8 December 1938 p 534 Societe Nationale de Constructions de Moteurs Argentuil in French Argentuil SNCM November 1938 Archived from the original on 16 October 2014 Retrieved 11 October 2014 Parmentier Bruno Sema 12 Aviafrance Retrieved 14 October 2012 Retrieved from https en wikipedia org w index php title Lorraine Algol amp oldid 1102858155, wikipedia, wiki, book, books, library,
