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.
[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 cam-ring drove roller tappets, mounted in the cam-case, which in turn operated rocker arms, fitted with ball bearings, via pushrods.